Question

If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens ? the diameter of the moon is 3.48 × 10⁶ m and the radius of lunar orbit is 3.8 × 10⁸m.

Answer 1

Diameter of the image of the moon formed by the objective lens, d = α f₀

`=>d=`

`=>d=(3.48xx10^6)/(3.8xx10^8)xx15`

⇒d=0.135 m = 13.5 cm