Question 139: Wave Optics

Question

Calculate the limit of resolution of a telescope
objective having a diameter of 200 cm, if it has
to detect light of wavelength 500 nm coming
from a star :-

Accepted Answer

Limit of resolution of telescope $$(	heta)  = {{1.22\lambda } \over D}$$
$$	heta  = {{1.22 	imes 500 	imes {{10}^{ - 9}}} \over {200 	imes {{10}^{ - 2}}}} = {{1.22 	imes 500 	imes {{10}^{ - 9}}} \over 2}$$
$$	heta $$ = 305 ÃÂ 10
Ã¢ÂÂ9
radian

Answer

610 × 10
–9
radian

Answer

457.5 × 10
–9
radian

Answer

305 × 10
–9
radian

Answer

152.5 × 10
–9
radian

Wave Optics

Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength 500 nm coming from a star :-

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