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Q. No.Given below are two statements:
| Assertion (A): | An ideal black body emits and absorbs radiation of every possible frequency. |
| Reason (R): | An increase in the temperature of a body causes its radiation spectrum to peak at progressively higher frequencies. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Planck's Theory |
 50%
Level 3: 35%-60%
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| Assertion (A): | The kinetic energy of photo-electrons increases with an increase in the frequency of incident light where v>v0. |
| Reason (R): | Whenever the intensity of light is increased the number of photo-electron ejected always increases. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Planck's Theory |
Level 4: Below 35%
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Q. No.
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