A Gallilean telescope has objective and eye-piece of focal lengths 200 cm and 2 cm respectively. The magnifying power of the telescope for normal vision is
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a
90
b
100
c
108
d
198
answer is B.
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Detailed Solution
For normal vision (relaxed eye), the image is formed at infinity. Hence the magnifying power of Gallilean telescope = =fofe=2002=100.
A Gallilean telescope has objective and eye-piece of focal lengths 200 cm and 2 cm respectively. The magnifying power of the telescope for normal vision is