Optics Question 417

Question: The sun’s diameter is 1.4×109m and its distance from the earth is 1011m. The diameter of its image, formed by a convex lens of focal length 2m will be

[MP PET 2000]

Options:

A) 0.7 cm

B) 1.4 cm

C) 2.8 cm

D) Zero (i.e. point image)

Show Answer

Answer:

Correct Answer: C

Solution:

θ=AB1011=AB2AB=2×1.4×1091011=2.8 cm



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