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