KCET · Physics · Ray Optics
For a given pair of transparent media, the critical angle for which colour is maximum?
- A Green
- B Red
- C Blue
- D Violet
Answer & Solution
Correct Answer
(B) Red
Step-by-step Solution
Detailed explanation
Red light has the longest wavelength and the
smallest refractive index within the visible region. Thus, it bends least when passing from glass to air. As a result, its critical angle is maximum.
smallest refractive index within the visible region. Thus, it bends least when passing from glass to air. As a result, its critical angle is maximum.
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