Appeared in: 2026 (2 sets)
(iv) (a) An astronomical telescope has objective lens and eyepiece of focal lengths $80\text{ cm}$ and $4\text{ cm}$ respectively. To view the image in normal adjustment, the lenses must be separated by a distance of :
(A) $84\text{ cm}$
(B) $76\text{ cm}$
(C) $20\text{ cm}$
(D) $320\text{ cm}$
OR
(b) Consider the telescope described in question (iv) (a). Its magnifying power in normal adjustment will be :
(A) $320$
(B) $84$
(C) $76$
(D) $20$