IF hat j denotes a unit vector along an incident ray. hat r a unit vector along the refracted ray into a medium of refractive index mu and hat n a unit vector normal to the boundary of the media directed towards the incident medium then the law of refraction can be written as

IF hat j denotes a unit vector along an incident ray. hat r a unit vec

1.	IF hat j denotes a unit vector along an incident ray. hat r a unit vector along the refracted ray into a medium of refractive index mu and hat n a unit vector normal to the boundary of the media directed towards the incident medium then the law of refraction can be written as
Answer» `HAT I, hat n= (HATR .hatn)` `hati times hatn= MU(hatn times hatr)` `hati times hatn=(hatr times hat n)` `mu(hati times hatn)=hatr times hatn` Answer :C