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JEE · NEET Previous Year Question

$The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 is of the order of$

Topic: NEET PYQ

Answer: D. Full step-by-step solution below.

A $1 0^{6} rad$
B $1 0^{- 2} rad$
C $1 0^{- 4} rad$
D $1 0^{- 6} rad.$

Correct answer: D

Solution

(c): R.P. = 1/∆ θ The angular resolution, ∆ θ = \frac{1.22 λ}{D} = \frac{1.22 \times 5000 \times 1 0 ^{- 8}}{0.1} = 6.1 \times 1 0^{- 4} = 1 0^{- 4}

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