When moving from a denser material to a less dense material.
Angle of refraction
The normal
This is total internal reflection where the angle of refraction is 90 degrees and its incident angle would be the critical angle(angle of incident for which the angle of refraction is 90).... This hapens when the angle of incidence is in a medium more dense than the angle of refraction's medium
As it is parallel to the normal to the surface, the angle of incidence is zero and hence the angle of refraction also has to be zero. Hence no deviation and no refraction.
normal.
Angle of refraction
the angle between the refracted ray and the normal
Angle of refraction will be less compared to the angle of incidence in this case.
Refraction
terms realated to refraction of light are * interface * incident ray * refracted ray * point of incidence *normal *angle of incidence * angle of refraction *angle of deviation
The normal
The angle of refraction is the angle between the refracted ray and the normal (a perpindicular line to the tangent and the plane of the surface). A ray that enters at the normal angle leaves at the normal angle; there is no angle between the ray and the normal, so it is 0o.
17° to the normal.
This is total internal reflection where the angle of refraction is 90 degrees and its incident angle would be the critical angle(angle of incident for which the angle of refraction is 90).... This hapens when the angle of incidence is in a medium more dense than the angle of refraction's medium
normal
As it is parallel to the normal to the surface, the angle of incidence is zero and hence the angle of refraction also has to be zero. Hence no deviation and no refraction.
normal