When a ray of light is incident normally on an air- glass interface, its angle of refraction is
Answer Details
When a ray of light is incident normally on an air-glass interface, its angle of refraction is 0 degrees. This is because when light travels from one medium to another, it changes direction, a phenomenon known as refraction. The amount of refraction depends on the angle at which the light enters the second medium, as well as the properties of the two media, such as their refractive indices.
In the case of an air-glass interface, since the angle of incidence is normal, that is, the ray of light is perpendicular to the surface, the angle of refraction is also zero. This means that the light continues to travel in a straight line without changing its direction.
So the correct answer to the question is 0 degrees.