Q. No.The frequency \(1057~\text{MHz}\) of radiation arising due to electron transition between two close energy levels in hydrogen belongs to:
1. radio waves
2. infrared waves
3. microwaves
4. \(\gamma\text-\)rays
Subtopic: Electromagnetic Spectrum |
From NCERT
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Which physical quantity does not change in a vacuum for \(X\text-\)rays?
1. Speed of light
2. Wavelength
3. Frequency
4. None of these
1. Speed of light
2. Wavelength
3. Frequency
4. None of these
Subtopic: Electromagnetic Spectrum |
From NCERT
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The \(X\text-\)ray beam can be deflected by:
| 1. | Magnetic field | 2. | Electric field |
| 3. | Both 1 and 2 | 4. | None of these |
Subtopic: Electromagnetic Spectrum |
From NCERT
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An electromagnetic radiation has an energy \(14.4~\text{keV}\). To which region of the electromagnetic spectrum does it belong?
1. Infrared region
2. Visible region
3. \(X\text-\)ray region
4. \(\gamma\text-\)ray region
1. Infrared region
2. Visible region
3. \(X\text-\)ray region
4. \(\gamma\text-\)ray region
Subtopic: Electromagnetic Spectrum |
65%
From NCERT
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Which of the following electromagnetic waves has minimum frequency?
1. Radio waves
2. Infrared waves
3. Microwaves
4. X-rays
Subtopic: Electromagnetic Spectrum |
74%
From NCERT
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Light is a kind of wave. The wavelength of visible light ranges from about \(4000~\mathring{A}\) to \(7000~\mathring{A}\). Which of the following statements is false?
| 1. | Ultraviolet light has a wavelength shorter than \(4000~\mathring{A}\). |
| 2. | Infrared light has a wavelength longer than \(7000~\mathring{A}\). |
| 3. | Red light has a wavelength near about \(7000~\mathring{A}\). |
| 4. | Violet light has a wavelength near about \(7000~\mathring{A}\). |
Subtopic: Electromagnetic Spectrum |
76%
From NCERT
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The most penetrating radiation out of the following is:
1. \(X\text-\)rays
2. \(\beta\text-\)rays
3. \(\alpha\text-\)rays
4. \(\gamma\text-\)rays
Subtopic: Electromagnetic Spectrum |
82%
From NCERT
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The decreasing order of the wavelength of infrared, microwave, ultraviolet and gamma rays is:
| 1. | Gamma rays, ultraviolet, infrared, microwaves |
| 2. | Microwaves, gamma rays, infrared, ultraviolet |
| 3. | Infrared, microwave, ultraviolet, gamma rays |
| 4. | Microwave, infrared, ultraviolet, gamma rays |
Subtopic: Electromagnetic Spectrum |
81%
From NCERT
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Choose the correct option:
| 1. | The radiation in increasing order of frequency are radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays. |
| 2. | The wavelength of colours in increasing order is violet, indigo, green, yellow, orange and red. |
| 3. | The speed of light is maximum in vacuum. |
| 4. | All options are correct. |
Subtopic: Electromagnetic Spectrum |
91%
From NCERT
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Which of the following is not an electromagnetic wave?
1. Radio wave
2. Micro wave
3. Cosmic rays
4. -rays
Subtopic: Electromagnetic Spectrum |
85%
From NCERT
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