Physics · Ray Optics
A ray of light passes from a denser medium to a rarer medium at an angle of incidence i. The reflected and refracted rays make an angle of 90° with each other. If the angles of reflection and refraction are r and r' respectively, the critical angle for the pair of media is given by:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1sin-1(tan r)✓
- 2sin-1(tan r')
- 3tan-1(sin i)
- 4sin-1(cot r)
Correct answer
sin-1(tan r)
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