If `hat(i)` denotes a unit vector along incident light ray, `hat (r)`a unit vector along refracted ray into a medium of refraction index `mu` and `hat (n)` unit vector normal to boundary of medium directed towards incident medium, then law of refraction is

If hat(i) denotes a unit vector along incident light ray, hat( r) a unit vector along refracted ray into a medium of refractive index mu and hat(n) unit vector normal to boundary of medium directed towards incident medium, then law of refraction is

If hat(i) denotes a unit vector along incident light ray, hat( r) a unit vector along refracted ray into a medium of refractive index mu and hat(n) unit vector normal to boundary of medium directed towards incident medium, then law of refraction is

If hati denotes a unit vector along incident light ray, hati a unit vector along refracted ray into medium of refracted ray into medium of refractive index p and n is vector normal to boundary of media directed towards incident medium, then the law of refraction can be written as

A unit vector along the incident ray of light is hat(i) . The unit vector for the corresponding refracted ray of light is hat(r ).hat(n) , a unit vector normal to the boundary of the medium and directed towards the incident medium. If mu is the refractive index of the medium, then snell's law (second law) of refraction is

A unit vector along the incident ray of light is hat(i) . The unit vector for the corresponding refracted ray of light is hat(r ).hat(n) , a unit vector normal to the boundary of the medium and directed towards the incident medium. If mu is the refractive index of the medium, then snell's law (second law) of refraction is

The unit vector along hat(i)+hat(j) is