A ray of lightfrom a densermedium strikes arare medium asshown in figure. The reflected andrefracted rays make an angle of 90^\circ with each other. The angles of reflection and refraction are r and r'. The critical angle would be (1996)

Correct Answer is : sin−1(tanr)

Class 12 NEET Physics Optics Questions Part 1

Question : 75 of 100

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A ray of lightfrom a densermedium strikes arare medium asshown in figure. The reflected andrefracted rays make an angle of 90° with each other. The angles of reflection and refraction are r and r′. The critical angle would be

(1996)

sin−1(tan‌r)
sin−1(sin‌r)
cos−1(tan‌r)
tan−1(sin‌r).

Validate

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