Question

Determine the limit of resolution of a telescope for the light of wavelength 500 nm if the telescope objective has diameter of 5.08 m.

Answer 1

Data: λ = 500 nm = 5 × 10⁻⁷ m, D= 5.08 m

The angular limit of resolution of the telescope,

θ = `(1.22λ)/D`

= `(1.22 xx 5 xx 10^-7)/5.08`

= 1.2 × 10⁻⁷ rad