Which of the following statement is not correct for electromagnetic radiations;

1. the wavelength is the distance between two successive crests
2. frequency is the number of waves passing throgh a point per second
3. velocity of a wave is the distance covered by particular wave in one second
4. all electromagnetic radiations have equal wavelengths
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Answer: D
Explanation:
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Electromagnetic waves consist of;

1. electrical properties
2. magnetic properties
3. both electric and magnetic properties
4. none of these
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Answer: C
Explanation:
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Most important electromagnetic wave is;

1. x-rays
2. Visible light
3. gamma rays
4. Radio waves
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Answer: B
Explanation:
• Visible light enable us to see
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Which electromagnetic radiation has longer wavelength?

1. x-rays
2. microwaves
3. gamma rays
4. Radio waves
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Answer: D
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Which electromagnetic radiation has Shorter wavelength?

1. x-rays
2. microwaves
3. gamma rays
4. Radio waves
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Answer: C
Explanation:
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Which electromagnetic radiation has higher frequency?

1. x-rays
2. microwaves
3. gamma rays
4. Radio waves
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Answer: C
Explanation:
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Which electromagnetic radiation has low frequency?

1. x-rays
2. microwaves
3. gamma rays
4. Radio waves
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Answer: D
Explanation:
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Which electromagnetic radiation has higher energy?

1. x-rays
2. microwaves
3. gamma rays
4. Radio waves
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Answer: C
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Which electromagnetic radiation has lower energy?

1. x-rays
2. microwaves
3. gamma rays
4. Radio waves
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Answer: D
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Source of radio waves is;

1. vibrating electrons
2. cell phones
3. radio stations
4. All of these
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Answer: D
Explanation:
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