Q.

What are the laws of refraction?


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a

The incident ray, the normal at the point of incidence, and the refracted ray all lie in the same plane for the two given transparent media.

b

The ratio of the sine of the angle of incidence (sin i) to the sine of the angle of refraction (sin r) is always constant for the light of a given colour and the given pair of media.

c

Both 1 and 2

d

None 

answer is C.

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Detailed Solution

Both 1 and 2 are the laws of refraction.
Laws of refraction state that:
       “The incident ray, the refracted ray and the normal to the interface of two media at the point of incidence all lie on the same plane.”
       “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This is also known as Snell’s law of refraction.”
sin isin r= constant
 
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