- 1(current)
Q. No.The energy of the photon with a frequency of 3 × 1015 Hz is:
1. 1.988 × J
2. 1.588 × J
3. 1.288 × J
4. 2.988 × J
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The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ( λ1 and λ2 ) will be:
1. λ1 = 2λ2
2. λ1 = 4λ2
3. λ1 = λ2
4. λ1 = λ2
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Match types of wave in Column-I with the corresponding frequency in Column-II and mark the appropriate option:
|
Column-I
(Types of Wave)
|
Column-II (Corresponding Frequency) |
||
| A. | X-rays | I. | |
| B. | Ultraviolet wave (UV) | II. | |
| C. | Long radio waves | III. | |
| D. | Microwave | IV. |
| A | B | C | D | |
| 1. | IV | I | III | II |
| 2. | I | IV | II | III |
| 3. | I | IV | III | II |
| 4. | IV | III | I | II |
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What is the correct arrangement of the following electromagnetic spectrum in the increasing order of frequency?
| 1. | Cosmic rays < Amber light < Radiation of FM radio < X-rays < Radiation from microwave ovens |
| 2. | Radiation from FM radio < Radiation from microwave oven < Amber light < X- rays < Cosmic rays |
| 3. | Radiation from microwave ovens < Amber light < Radiation of FM radio < X-rays < Cosmic rays |
| 4. | Cosmic rays < X-rays < Radiation from microwave ovens < Amber light < Radiation of FM radio |
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The neon gas emits radiation of 616 nm. The number of quanta that are present in 2 J of energy is:
1. \(6.2 \times 10^{-18} \)
2. \(5.6 \times 10^{17} \)
3. \(6.2 \times 10^{18} \)
4. \(32.2 \times 10^{-20}\)
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- 1(current)
Q. No.
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