Question

The critical angle for a beam of light passing from a dense medium into the air is ${25.4}^{\circ }$. This means that any light rays that strike the surface interface between the dense medium and the air with an angle less than ${25.4}^{\circ }$ are:

• A. completely reflected
• B. partially reflected and partially refracted
• C. completely absorbed
• D. partially absorbed and partially transmitted
• E. completely transmitted

Answer 1

The correct option is E completely transmitted

For total internal reflection , the angle of incidence should be greater than critical angle .In the given case , the angle of incidence is less than critical angle therefore total internal reflection will not occur and light ray will be transmitted completely.