- 1(current)
Q. No.The energy of the EM waves is of the order of \(15~\mathrm{keV}\). To which part of the spectrum does it belong?
1. X-rays
2. Infrared rays
3. Ultraviolet rays
4. \(\gamma\)-rays
1. X-rays
2. Infrared rays
3. Ultraviolet rays
4. \(\gamma\)-rays
Subtopic: Â Electromagnetic Spectrum |
 61%
Level 2: 60%+
NEET - 2015
Hints
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:
| 1. | the frequency of microwaves has no relation with the natural frequency of water molecules. |
| 2. | microwaves are heatwaves, so always produce heating. |
| 3. | infrared waves produce heating in a microwave oven. |
| 4. | the frequency of the microwaves must match the resonant frequency of the water molecules. |
Subtopic: Â Electromagnetic Spectrum |
 80%
Level 1: 80%+
AIPMT - 2013
Hints
The decreasing order of 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: Â Electromagnetic Spectrum |
 85%
Level 1: 80%+
AIPMT - 2011
Hints
- 1(current)
Q. No.
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