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:

completely reflected

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partially reflected and partially refracted

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completely absorbed

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partially absorbed and partially transmitted

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completely transmitted

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Solution

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.

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The critical angle for a beam of light passing from a dense medium into the air is 25.4∘. 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∘ are:

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: