The steps of the convex lens imaging experiment are divided into three steps which are observing and recording the focal length of the convex lens, placing the object outside of twice the focal length, and moving the light screen to find a clear image.
1, observe and record the focal length of the convex lens
The purpose of determining the focal length of the convex lens is to use the focal length of the convex lens to calculate the range of the object distance and image distance during the experiment. Before starting the experiment, the focal length of the convex lens needs to be observed and recorded. This can be done by placing the convex lens directly in front of the sunlight and measuring the distance from the spot of light focused by the sunlight passing through the convex lens to the convex lens; this distance is the focal length of the convex lens.
2, put the object outside the twice the focal length
The object is placed outside the twice the focal length of the convex lens in order to make the object in the convex lens into an inverted, shrunken solid image. During the experiment, the object needs to be placed at a distance greater than twice the focal length from the convex lens. The proper object distance can be found by adjusting the distance between the object and the convex lens.
3, moving the light screen to find a clear image
Moving the light screen to find a clear image is the core step of the experiment, but also the expression of the results of the experiment. After adjusting the object distance, you can move the light screen to find a clear image. Attention needs to be paid to the position of the light screen to ensure that it is in focus and that the image is clearly visible. When the image is clear, you can observe the size of the image, its inversion, and its reality.
Convex lens applications
1, magnifying glass applications
Convex lens has the function of magnifying the image of the object, so it is widely used in the manufacture of a variety of optical instruments and equipment, such as microscopes, telescopes and so on. Magnifying lenses can also be used to observe jewelry, antiques, prints and other tiny items in order to better understand their details and features.
2, Photographic Applications
Convex lenses play an important role in the field of photography. Photographers can use convex lenses to focus light and control the sharpness of an image. Convex lenses can also be used to make a variety of optical instruments, such as cameras and video cameras, to capture high-quality images and videos.
3, medical applications:
Convex lenses also have a wide range of applications in the medical field. For example, doctors can use convex lenses to look at a patient's eyes, skin and other parts of the body in order to better diagnose and treat diseases. Convex lenses can also be used to make medical devices, such as surgical microscopes and endoscopes, to improve the accuracy and safety of surgery.