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A ray of light falls on a transparent glass slab of refractive index 1.62. What is the angle of incidence if the reflected ray and refracted ray are mutually perpendicular? |
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Answer» `TAN^(-1)(1.62)` `i+R=90^(@)` `r=(90^(@)-i)` From Snel's law `mu=(sin i)/(sin r)=(sin i)/(sin(90^(@)-i))` `=(sin i)/(cos i)=tan i` `mu=tani` `i=tan^(-1)(mu)` `i=tan^(-1)(1.62)` 
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