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