MCQ
An astronomical telescope has a large aperture to
- Areduce spherical aberration
- Bincrease span of observation
- ✓have high resolution
- Dhave low dispersion
✓
Answer
Correct option: C.
have high resolution
c
$y=\frac{\lambda D}{2 a}=\frac{6000 \times 10^{-10} \times 1}{2 \times 1 \times 10^{-4}}=3 \times 10^{-3}=3 \mathrm{\,mm}$
$y=\frac{\lambda D}{2 a}=\frac{6000 \times 10^{-10} \times 1}{2 \times 1 \times 10^{-4}}=3 \times 10^{-3}=3 \mathrm{\,mm}$
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