Question

If a ray passes from air to glass in a spherical glass slab and passes through the centre of the slab without deviation, then the angle of incidence from air to glass at the point on the glass slab is. A. 45° B. 0° C. 90° D. 180°​

Answer 1

Ans 0 degrees

Explanation:

Answer 2

If a ray passes from air to glass in a spherical glass slab and passes through the centre of the slab without deviation, then the angle of incidence from air to glass at the point on the glass slab is B. 0°.

The light ray is refracted as it enters from air to the glass slab.

The ray of light passes without deviation when the path of the incident ray coincides with the normal to the surface.

The normal is at 90° to the surface.

Now, the angle of incidence is measured as the angle between the incident ray and the normal.

As the incident ray coincides with normal in this case, the angle of incidence will be 0°.