| Assertion (A): When a light wave travels from rarer to denser medium, its speed decreases. Due to this reduction of speed the energy carried by the light wave reduces. |
| Reason (R): Energy of wave is proportional to the frequency. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: D
Solution :
| Option [d] is correct. |
| Explanation: When a light wave travels from rarer to denser medium, its speed decreases. |
| But this reduction of speed does not imply the loss of energy carried by the light wave. So the assertion is false. |
| Energy of wave is proportional to the frequency of the wave which remains same in very medium. Hence there is no loss of energy. |
| So, the reason is true. |
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