Question

The total energy carried by the light wave when it travels from a rarer to a non-reflecting and non-absorbing medium

• A. either increases or decreases depending upon angle of incidence
• B. decreases
• C. remains same
• D. increases

Hint:

Remember, in non-absorbing and non-reflecting mediums, the energy carried by light remains constant, but the speed and wavelength may change.

Answer 1

The Correct Option is C

In the case of light traveling from a rarer to a denser medium, as long as the medium is non-absorbing and non-reflecting, the total energy of the wave remains unchanged. The change in the speed and wavelength of the light in the new medium does not affect the total energy of the wave. This is because the total energy of an electromagnetic wave depends on its frequency and amplitude, both of which remain constant when it enters a new medium that doesn't absorb or reflect the light. Therefore, the total energy carried by the light wave remains the same as it travels from a rarer to a non-reflecting and non-absorbing medium. The correct answer is option (3).