Question

A telescope consists of two lenses of focal lengths `0.3 m and 3 cm` respectively. It is fucussed on moon which subtends an angle of `0.5^@` at the obejctive. Calculate the angle subtended at the eye by the final image in normal adjustment of the telescope.

Answer 1

Correct Answer - `5^@`
Here, `f_0 = 0.3 m and f_e = 3 cm, prop = 0.5^@, beta = ?`
Use `(beta)/(prop) (f_0)/(f_e)`.