Compilation of the 2006 exam (lens and application)
Multiple choice questions:
(2006 Hebei) Xiao Ming explored the imaging rules of convex lenses and also maintained convex lenses Position, put the candle on AB, C, D four points, adjust the position of the light screen, as shown in Figure 2, he summarizes the following statement. That's right (A)
A. The imaging characteristics of a camera
B. The imaging characteristics of a magnifying glass made of candles B?
C. The imaging characteristics of a slide A point, light the candle. The imaging characteristics of the projector d. Light the candle. It forms a convex lens imaging experiment at point c. When the distance to the light screen is 12 cm, the convex lens light screen has a clear reduced image. From this, it can be judged that the focal length of the convex lens can be (B)
A .5cm B.10cm C.15cm D.20cm.
(Jiangxi, 2006) The focal length of the three convex lenses is 20cm. Xiao Ming and others made some simple optical equipment. The first time they made a simple camera to shoot murals, and the second time they built a projector. Presentation slide; small insect viewed directly with magnifying glass. During use, connect the following correspondence correctly (C)
(2006, Chaoyang District, Beijing) The focal length of the convex lens is 12cm, and the object is 7cm from the center of the lens on the main axis, like this Object (C)
A. Inverted, lowered real image
B. Inverted, enlarged real image
C. Upright, enlarged virtual image
D. Upright, other large virtual images lt; BR / (Linyi City 2006) Li Li, the mother of classmate Li Li, started from junior high school and had more than the original hard drive, but also found that Li's eyes read books than normal For a closer distance, you choose the correct one based on the following judgment and explanation of corrective measures by Li Ming (B)
A. Li Min students who suffer from myopia need to wear glasses with convex lenses
B. Student Li Min, who suffers from myopia and needs to wear glasses made with concave lenses
C. Student Li Ming suffers from farsightedness and needs to wear glasses
D. Li Ming My classmates who suffer from hyperopia need to wear glasses with convex lenses made of concave lenses
In the (2006 Xiamen) experiment to study the imaging rules of convex lenses, the following statement is correct: (C)
Optical platform equipment order candle light screen, convex lens
B virtual image can be on the light screen
C, becoming a real image when the object distance decreases, the image distance increases , such as large
D, in the previous experiment, you have to adjust the height of the candle, the light screen, and the convex lens so that their centers are in a straight line
(2006 Foshan)( C)
(2006 Haizhu District, Guangzhou City) The main light axis of the candle is 40 cm from the convex lens, and the lens on the other side is clearly magnified by Xu Guangping.
If the candle is 40 cm away from the lens direction in its original position, a clear image - fixed (D) upright
A. enlarged virtual image B. C. D. reduced
(2006 Hebei) Xiao Ming Research The convex lens imaging law also maintains the position of the convex lens. Place the candle at the four points A, B, C, and D, respectively, at the positions shown. Adjust the mask as shown in Figure 2. After exploring, he summarized the following parameters to the right: (A )
A. The imaging characteristics of the camera’s candle placed at a point
B. The magnifying glass is based on the imaging characteristics of the candle B?
C. Slide show Imaging characteristics of film projector d. Light a candle
D. Place the candle on an object from point c to point B, such as image
(2006 Yichang) It can be seen through a convex lens Inversion forms a magnified real image Xu Guangping, its imaging principle (C)
A. Camera B. Magnifying glass C. Slide projector D. Application in optical instruments under car rearview mirror BR /gt; (2006 Year Hengyang) Ordinary people's eyes are like the lens of a camera and the cornea acts as a convex lens. When people observe objects, such as (A)
A. Inverted, lowering the real-time image B. Inverted to the retina, the object expands
C. Upright, enlarged virtual image D. Upright, enlarged real image
(Zhuzhou) TV introduces an invisible light called infrared remote control, you can use it To achieve real-time image control, sometimes the remote control does not control the window on the TV, but pressing the buttons along the wall arranged in one direction can also control the TV, which is the use of (A)
A. Reflection of the TV . Light B. Refraction of light C. Straight line propagation of light D. Speed? Light
(Taiyuan, 2006) The eye is like a camera. The light emitted by the object is refracted through the lens and imaged on the retina. The retina becomes inverted. (B)
A. B. Inverted real-time image , reduced real-time image
C. Upright, enlarged virtual image D. Upright, narrow virtual image ***Same vision defects, such as
(2006 Zhenjiang et al. enlarged myopia and Farsightedness.
) The principle diagram of the imaging of the right eyeball is that a worker with a visual defect needs to wear his type of vision defect and the type of lens to correct his vision (A)
A. Concave and convex lenses B. Farsightedness, farsightedness C .Convex lens D. Myopia, myopia, concave
(Zhenjiang, 2006) The focal length of the convex lens is 10cm. The moving distance of the lit candle changes with the convex lens. The image size is between 50cm and 15cm. The image distance is (B ) gt; 2.1 The image becomes larger, the image distance becomes smaller B. Like the larger image, the distance becomes larger
C. The image becomes smaller, the image distance becomes smaller D. Like the image becomes smaller , the image distance becomes larger
Optical instruments below (Xuzhou, 2006) are not convex lenses (C)
A. Magnifying glass B. Glasses C. Camera D. Application of microscope
gt; Light path diagram below Yancheng in 2006, right (A)
(Jinzhou in 2006) Which of the following statements is correct (A)
A. The projector lens is equivalent to an eye, which is equivalent to a convex lenslt; BR / B. Wear glasses for myopia
C. Use a magnifying glass to look at the map. The distance mapped by the magnifying glass should be greater than
D. The focal length of the convex lens of the camera puts the object in an upright position on the retina, reducing the real-time image
(Shenyang, 2006) In a sunny classroom, Xiaoxiong carries a convex lens with a focal length of 10 centimeters. Between the white walls and Windows Mobile, the wall can be seen through the window, just like (B)
Big B A. Inverted, inverted, reduced
C. Upright, expanded It is upright and narrow
(2006 Chengdu) 4 imaging optical instruments, the following statement is correct (C)
A. The magnifying glass is upright and magnifies the real image
p>B. Photography, to being built, lowering the live image
C. Real slide projector with the machine inverted, zooming in
D.
(2006 Chengdu) The glasses are upright, and the focal length of the lens for enlarging the virtual image is 10cm. When Xiaogang used it to produce photography works for the exhibition on Small Materials, the camera was in the process of moving (A)
A. The distance between the same large image becomes larger
B. Like
C. The distance between the smaller and larger image becomes smaller before the distance between the larger image becomes larger. 50 centimeters is 12cm
gt; D. The first small image is larger, and the image distance becomes smaller
Fill in the blank:
The law under (Inner Mongolia), The focal length of the convex lens used in the convex lens imaging experiment is 10 cm, and the position of the experimental convex lens is fixed. When the focal length of the mask is 1.5 times, the image on the screen. You think that in a straight line with the CD, if the mask's position is moved at least centimeters, the image will appear on any moving candle screen.
Answer: 5
(2006 Beijing) A group of cylindrical lenses refract light rays parallel to the propagation direction. As shown in Figure 16, from the chart, the focal length of the lens is centimeters; when Zhu Yan Discharge? The left side of the convex lens is 12 cm, here as shown in Figure 16 B. From the magnified virtual image of the convex lens (fill: "upright" or "reverse") can be seen, right through the lens.
Answer: 15 cm, upright
(2006 Wuhu) The lens in the human eye structure is equivalent to a mirror, the lens enters the retina, and the light passes from the object (optional vertical or " Like) reduce?. The distance at which the eye object is clearest and most easily fatigued is called the photopic distance. The distance at which presbyopic vision can be determined based on the structure of the eye (optional "greater than", "equal to" or "less than" ") The clear vision distance of the normal human eye.
Answer: Convex lens, inverted, transparent bottles that are never allowed to be discarded in the forest anywhere, compared to
(2006 Heilongjiang). This is due to rainwater entering the drink bottle which corresponds to _________ mirror, sunlight ________, and may cause fires in the forest.
Answer: Convex lens to condense light
(2006 Qinzhou City) The camera lens is equivalent to a lens (optional convex or concave); stamps use a magnifying glass (as in Figure 8 (shown in ) to see a zoomed image of the image (optional "real" or "virtual").
Answer: Convex Virtual
(2006 Guilin)? At that time, Xiao Ming was doing homework at home. He dropped a drop of water on the glass table of his desk and imagined what would happen through the water drop. He found that the text on the animated image of the pressure plate below was under greater pressure. This is because the water droplets at this time are equivalent to the enlarged image formed by the refracted water droplets of the text on the picture (optional "real" or "virtual").
Answer: Convex lens, virtual
(2006 Yichang) A set of lenses at each end of the microscope tube. The function of each set of lenses is equivalent to a lens. The human eye passes through the microscope. Tiny objects, magnified like (fill in virtual or real).
Answer: Convex, fictional.
(Huanggang, 2006) In sports, researchers often use flash photography to analyze and guide the actions of athletes. When an athlete is exposed to light emitted from a light source _______
A _______ mirror is formed in front of the camera
___________________
Rhythm flash strobe photography is like shooting It is a photographic light source. Looking at the photo in the picture, we can see the strobing
Photography background___________
(fill in "light" and "dark").
Answer: reflective convex lens; inverted, reduces the real-time image darkness
(Xiangfan, 2006) Fish raised in round fish tanks look better than real fish, this is because A round fish tank is equivalent to a mirror.
Answer: Convex lens
(2006 Changsha) The picture shows a scene where a beam of parallel light passes through the lens. The lens shown in the picture is a __________ lens. When it acts as a camera lens, the object is outside 2x the focal length, hand-inverted, as reduced by _________.
Answer: Convex solid
(2006 Zhuzhou) Eyes are the windows to the soul. Figure 1 is a small bright light path diagram, looking at distant objects, his ____________ eyes. The best correction method is to wear ____________ lens lenses for glasses.
Answer: Myopia; Concave
(2006 Changchun) The human eye camera lens and cornea together are equivalent to a _______________ lens, and the light from the object will be formed on the retina _______________ (optional "upright" or "inverted"). If you don't pay attention to eye hygiene for a long time, it will lead to myopia. There is a kind of surgery to treat myopia, which uses laser treatment on the cornea. The light deflection ability of the lens composed of the lens and the cornea becomes _______________ (optional "strong" or "weak").
Answer: Convex (or convergent); inverted; weak
(Jinzhou, 2006), a scene captured by Xiaoqiang’s camera with a certain focal length. If a camera is on set, film the scene to ____ (optional "bigger" and "smaller" or "same") for a clear image.
Answer: Small
(2006 Yunnan) Convex lens light fusion effect. The focal length of the camera lens is 15cm, and the distance to the negative lens for a clear portrait should be 30cm (fill in "greater than", "less than" or "equal to"); % of the film is the same as (fill in "real" or "virtual").
Answer: Many, real eyes
(Qiu Xing, 2006) The structure is very similar to that of a camera. The lens is equivalent to a convex lens, which makes the image of an object on the retina. A, B is the schematic diagram below, it is myopia, when wearing glasses, corrective lenses (optional: "C" or "D") should be used.
Answers: A, D
Draw the diameter orbit of Problem:
(Guangzhou, 2006) and 13 light years AB through a convex lens.
(Chaoyang District, Beijing, 2006), as shown in Figure 9, according to the refraction of light, fill in the dotted box of a suitable lens.
(2006, Leshan, Sichuan) The optical path diagram of the lens is shown in Figure 1.
(2006 Xiamen) In Figure 12, the light path is completed to refract the light from the left toward the lenticular lens, and then refract toward the concave lens.
(2006 Hebei) Plot according to the following requirements. A schematic diagram of the imaging of a distant object in the human eye. Please fill in the dotted box in Figure B with the corresponding lens to enable the distant object to be imaged on the retina.
(Taizhou, 2006) In Figure 10, the approximate position of the image of the object seen by myopia is drawn, and the image point A' corresponding to the object point A in the image is marked.
(Jinzhou, 2006) and Figure 4. Refracted light of incident light.
(Taian, 2006) According to the following two charts or refracted ray and incident light, the corresponding answers are refracted ray and incident light respectively.
Experimental question:
(2006 Lianyungang) Do a convex lens imaging experiment, and the focal length of the lens is 10cm. As shown in the picture below, the student placed the candle and the lens, moved the light screen left and right, and still could not get a full image of the flame candle. The reason is. Students make appropriate adjustments (the object distance remains unchanged) and move the light screen and candle flame until Xu Guangping is clear and complete. The nature of the image.
Answer: The flame of the candle, the lens, the center of Xu Guangping, are different heights, inverted, enlarged real image
(Wuxi, 2006) Xiao Ming stands in the same position using a digital camera (The focal length can face changes) Two photos A and B were taken of the famous scenic spot in Wuxi - Xishan, as shown in the picture. He raised the question: What is the relationship between the size and focal length of an object imaged through a convex lens on a backlit screen? Xiao Ming investigates.
(1) Xiao Ming has some convex lenses, but they don’t know the focal length. You provide him with a certain degree of focal length of the lens. (Picture instructions)
(2) Measure the focal length of the convex lens. Xiao Ming has chosen the focal length to be 15cm, and the convex lens at 10cm is 5cm. While keeping the material from the experimental 35cm situation, the image formation is always followed and the image formation becomes smaller and smaller. . When Xiao Ming takes photos, you judge based on the experimental results, use a camera lens with a larger focal length.
(3) During the investigation, Xiao Ming always keeps the object distance constant and tells you the reason why he does this.
Answer: (1) Facing the convex lens towards the sun, put a piece of paper on the other side of the lens, adjust the distance of the lens from the plane of the paper until the smallest one appears on the paper, put the brightest point , the distance between the measuring points of the convex lens is the convex lens focal length (the same is corrected by other methods)
(2) The focal length of the camera lens that takes the B photo of the convex lens/gt; (3) The true image distance , the size of the focal length is related to the material, so the distance of the control object remains unchanged
(Fuzhou, 2006) Please read the following content carefully, study the relationship between the size of the real image and the focal length, and answer the questions as required . Human Eyes
Human eyes are like cameras. The difference between the eye and the camera is: the human eye changes the focal length of the lens by adjusting the curvature of the lens to obtain a clear and reduced real image, as shown in Figure 17; an ordinary camera determines the object distance by changing the image distance The situation becomes clear. The farthest point of the eye's accommodation that can be seen is called the far point, and the far point of the normal eye is very far away. The nearest point that the eye can see is called the near point. The near point is about 10 centimeters away from the eye in normal eyes. Eyes are important organs of the human body. Using your eyes for a long time, such as reading, watching TV, and using the computer, can cause eye fatigue. Common symptoms of eye fatigue are headaches and dry eyes. The distance at which the object is no longer easy to fatigue is called far vision, and the normal distance of the eye is 25 cm.
(1) Please complete something of similar nature.
(2) The human eye obtains a clear image by changing the lens, and an ordinary camera obtains a clear image by determining the distance of the object, which becomes clear through the change of the image.
(3) Based on the above situation, what do you think is normal human eye observation: (fill in the following options).
A. 0 to 10 cm B. 10 cm to 25 cm C. 10 cm very far away D. 0 to 25 cm
(4) How to prevent eye fatigue, you Proposed rationalization suggestions:
Answer: (1) Inversion; (2) The distance to the eye is 25 cm (or not a very long distance from the object to the focal length (or degree of curvature), image; (3) (c) of (4), like this? Read, take a proper rest or do eye exercises in the middle) Others
As shown in (Fuzhou), in Figure 12, Zhou Qian and several students are Doing experiments to explore the convex lens imaging "Xu Guangping's law clearly suggests a narrow inverted real image. At this time, Zhou Qian's student made a clear difference between the candle on the lens of his glasses and the convex lens (closer to the lens). Xu Guangping's original image
(1) In order to make the light screen clear, how to position the mask correctly without moving the candle and the lens
_______________________________________________________________
(2) The four small pictures are shown in Figure 13. The imaging conditions and correction methods of Zhou Shuoqian’s students’ myopia ()
A, ②①B, ①③C, ②④D, ③④
Answer: (1) The distance between the light screen and the convex lens moves in the direction; (2) B
(2006 Shaoguan) Xiaomingli Optical Platform, convex lens (focal length is 10 cm), candle , Match Xu Guangping, doing research on the law of convex lens imaging experiments
(1) The three sliders of the optical bench are A, B, and C. A convex lens, light screen and candle (lower left picture) should be placed. In B: Experimental discovery
(2) The light screen image is on the right. Do you think the reason for this phenomenon is:
(3) Observe and record the convex lens imaging, measurement and
(4) Place the candle 16 cm away from the convex lens and move Xu Guangping and Xiaoming back and forth (fill in whether you can see a clear image)
(5) Xiaoming uses an opaque one. The cardboard blocks half of the convex lens, and then moves the light screen back and forth. (Fill in "can" or "can't") The light screen sees the same thing.
Answer: (1) Convex lens (2) candle, convex lens, the three centers on the light screen are not the same level
(3) object distance; image distance (4) (5)
(2006 Nantong) Experiment on imaging rules of convex lenses on optical platforms:
(1) Measure the focal length of a convex lens with a focal length of _____ cm as shown in the figure.
(2) Turn the candle, convex lens, on the light screen on the light bench. Adjust the candle flame, convex lens mask in the center of the lit candle, approximately
(3). ) When the flame of the candle moves the light screen 30 cm from the convex lens, a clear inverted image appears on the light screen
_____. _______ is a regular job using imaging (filled optical instruments).
Answer: (1) 9.4 (9.2-9.5) (2) Same height (3) Lower; camera
(2006 Inner Mongolia) gives you a lens, I don’t know if it is a convex lens Or concave lens, you wrote a simple judgment method.
Answer: (1)
(2)
(3)
Answer: (1) For sunlight (parallel light source ) The lens moves, and a bright spot on the other side indicates a convex lens
(2) Touch the thick middle with your hand, and the thin description on both sides is a convex lens
() Light the candle and view the screen Whether the point on the other side is imaged, the image is a convex lens