An astronomical telescope has a large aperture to - Vidyadip

MCQ

An astronomical telescope has a large aperture to

A
reduce spherical aberration
B
increase span of observation
✓
have high resolution
D
have low dispersion

✓

Answer

Correct option: C.

have high resolution

c
$y=\frac{\lambda D}{2 a}=\frac{6000 \times 10^{-10} \times 1}{2 \times 1 \times 10^{-4}}=3 \times 10^{-3}=3 \mathrm{\,mm}$

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