Ray Optics and Optical Instruments - Result Question 47
49. A lens is placed between a source of light and a wall. It forms images of area and on the wall for its two different positions. The area of the source of light is
[1995]
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 49. (a)
Solution:
- (a) Size of images
and . From the displacement method, the area of the source of light .