Question

Aperture of human eye is 0.2 cm. The minimum magnifying power of a visual telescope has diameter 100 cm. Is
a . 500 b. 0.002 c. 0.02 d 100

Answer 1

As the angle A equal to the angle B thus from the similarity of triangles we have the minimum magnifying power of a visual telescope $100 / 0.2 = 500$ .

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