Large number of thin strips of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be
- Aa horse of less brightness
- Ba zebra of black stripes
- Ca horse of black stripes
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (a) a horse of less brightness
Explanation
A convex lens forms a complete image from light passing through any part of its surface, not from one spot.
The black strips only block some incoming light, so the full image of the horse still forms, just with reduced intensity (brightness).
No stripes appear on the image, since each lens point contributes to the whole picture.