- 1(current)
Q. No.The value of Planck's constant is 6.63 × 10–34 Js. The speed of light is 3 × 1017 nm s–1. Which value is closest to the wavelength in nanometers of a quantum of light with a frequency of 6 × 1015 s–1?
1. 25
2. 50
3. 75
4. 10
1. 25
2. 50
3. 75
4. 10
Subtopic: Electromagnetic Radiation |
87%
From NCERT
AIPMT - 2013
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A monochromatic infrared range finder of power 1milli watt emits photons with wavelength 1000 nm in 0.1 second. The number of photons emitted in 0.1 second is:
(Given: h = \(6.626 \times 10^{-34} J~s\) , c = \(3 \times 10^8 m~s^{-1}, \) Avogadro number = \(6.022 \times 10^{23}\))
1. \(30 \times 10^{37}\)
2. \(5 \times 10^{14} \)
3. \(30 \times 10^{34} \)
4. \(5 \times 10^{11} \)
Subtopic: Electromagnetic Radiation |
72%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Match the following:
| Column I | Column II | ||
| A. | X-rays | 1. | |
| B. | Ultraviolet wave (UV) | 2. | |
| C. | Long radio waves | 3. | |
| D. | Microwave | 4. |
| A | B | C | D | |
| 1. | 4 | 1 | 3 | 2 |
| 2. | 1 | 4 | 2 | 3 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
Subtopic: Electromagnetic Radiation |
76%
From NCERT
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Q. No.
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