Q.

The sun makes 0.5o angle on earth surface. Its image is made by convex lens of 50 cm focal length. The diameter of the image will be

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a

5 mm

b

7 mm

c

4.36 mm

d

None of these

answer is B.

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Detailed Solution

 Diameter of image d=0.5×π180×500=4.36

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The sun makes 0.5o angle on earth surface. Its image is made by convex lens of 50 cm focal length. The diameter of the image will be