Light of wavelength is used with a telescope whose objective diameter is

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Light of wavelength

550\,\text{nm}

is used with a telescope whose objective diameter is

1.5\,\text{m}

. Using

1\,\text{arc-sec}=4.85\times10^{-6}\,\text{rad}

, the minimum angular separation that can be resolved is closest to (a)

0.18\,\text{arc-sec}

(b)

0.09\,\text{arc-sec}

(c)

0.30\,\text{arc-sec}

(d)

0.08\,\text{arc-sec}