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+1 vote
41.5k views
in Physics by (36.4k points)

The critical angle of a medium for a specific wavelength, if the medium has relative permittivity 3 and relative permeability 4/3 for this wavelength, will be : 

(1) 60°

(2) 15°

(3) 45°

(4) 30°

2 Answers

+1 vote
by (52.1k points)
selected by
 
Best answer

Answer is (4) 30°

sin c = 1/2

c = 30°

+1 vote
by (33.1k points)

The correct answer is (4) 30°

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