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Q. No.An EM wave of intensity \(I\) falls on a surface kept in a vacuum and exerts radiation pressure \(P\) on it. Which of the following are true?
| (a) | Radiation pressure is \(\frac{I}{c}\) if the wave is totally absorbed. |
| (b) | Radiation pressure is \(\frac{I}{c}\) if the wave is totally reflected. |
| (c) | Radiation pressure is \(\frac{2I}{c}\) if the wave is totally reflected. |
| (d) | Radiation pressure is in the range \(\frac{I}{c}<P<\frac{2I}{c}\) for real surfaces. |
1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (c, d)
Subtopic: Â Properties of EM Waves |
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