(2013? Tianjin) in the investigation of "convex lens imaging law" in the experiment, the candle, convex lens and the light screen in the light seat position as shown in the figure, at this point in the
From the figure, the object distance is greater than the image distance, this time into an inverted reduced solid image, so the object distance is greater than 2 times the focal length, the image distance is between 1 times and 2 times the focal length.
Objective distance=50cm-30cm=20cm; image distance=65cm-50cm=15cm.
From the above analysis:
20cm>2f? f<15cm<2f
Solution: 7.5cmThe candle will be moved to the 40cm scale of the light stand, the object distance=50cm-40cm=10cm. 50cm-40cm=10cm, between 1x and 2x focal length, so it becomes an inverted magnified solid image.
The choice is AC.