Question 137: Wave Optics

Question

Diameter of the objective lens of a telescope is
250 cm. For light of wavelength 600nm.
coming from a distant object, the limit of
resolution of the telescope is close to :-

Accepted Answer

Limit of resolution = $${{1.22\lambda } \over d}$$
= $${{1.22 	imes 600 	imes {{10}^{ - 9}}} \over {250 	imes {{10}^{ - 2}}}}$$
= 2.9 ÃÂ 10
Ã¢ÂÂ7
rad.

Answer

3.0 × 10
–7
rad

Answer

4.5 × 10
–7
rad

Answer

1.5 × 10
–7
rad

Answer

2.0 × 10
–7
rad

Wave Optics

Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600nm. coming from a distant object, the limit of resolution of the telescope is close to :-

Choose the correct answer: