Diameter of the objective lens of a telescope is 250 cm

PHYSICS · Single correct · CBSE · Physics · Wave Optics · Wave Optics

Problem

Diameter of the objective lens of a telescope is 250 cm. For light of wavelength

600 \text{ nm}

. Coming from a distant object, the limit of resolution of the telescope is close to: (1)

1.5 \times 10^{-7} \text{ rad}

(2)

2.0 \times 10^{-7} \text{ rad}

(3)

3.0 \times 10^{-7} \text{ rad}

(4)

4.5 \times 10^{-7} \text{ rad}