Processing math: 100%

If the frequency of an EM wave is 10 MHz, then its wavelength is:
1. 30 m
2. 300 m
3. 3 m
4. none of the above

Subtopic:  Properties of EM Waves |
 77%
From NCERT
AIPMT - 1999
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The frequency order for γ-rays (b), X-rays (a), and UV-rays (c) is:
1. b>a>c 2. a>b>c
3. c>b>a 4. a>c>b
Subtopic:  Electromagnetic Spectrum |
 82%
From NCERT
AIPMT - 2000
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The biological importance of the ozone layer is:

1. it stops ultraviolet rays.
2. ozone layer reduces the greenhouse effect.
3. ozone layer reflects radio waves.
4. ozone layer controls O2/H2 ratio in the atmosphere.


 

Subtopic:  Electromagnetic Spectrum |
 86%
From NCERT
AIPMT - 2001
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Which of the following has the minimum wavelength?
1. X-rays
2. Ultraviolet rays
3. γ-rays
4. Cosmic rays

Subtopic:  Electromagnetic Spectrum |
From NCERT
AIPMT - 2002
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What is the cause of “Greenhouse effect”?
1. Infra-red rays
2. Ultraviolet rays
3. X-rays
4. Radio waves

Subtopic:  Electromagnetic Spectrum |
 62%
From NCERT
AIPMT - 2002
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The velocity of electromagnetic waves is parallel to:

1. B×E

2. E×B

3. E

4. B

Subtopic:  Properties of EM Waves |
 91%
From NCERT
AIPMT - 2002
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If λv,λx, and λm represent the wavelengths of visible light, x-rays and microwaves respectively, then:
1. λm>λx>λv
2. λv>λm>λx
3. λv>λx>λm
4. λm>λv>λx

Subtopic:  Electromagnetic Spectrum |
 88%
From NCERT
AIPMT - 2005
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