BPSC – Combined Competitive Examination · প্রশ্ন 114
In which medium will the speed of light be minimum?
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (C) Glass
ব্যাখ্যা
Speed of light = c/n; the higher the refractive index, the slower the light.
- (A) ভুল
Wrong: maximum in vacuum.
- (B) ভুল
Wrong: nearly as fast as in vacuum.
- (C) সঠিক
Correct: glass (n ≈ 1.5) slows light the most here.
- (D) ভুল
Wrong: n ≈ 1.33, less than glass.
- (E) ভুল
Wrong: only one of the options A–D is correct.