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If a source of power 4 kW produces 10^(2...

If a source of power 4 kW produces `10^(20)` photons per second,the radiatoin belongs to a part of the spectrum called

A

microwaves

B

ultraviolet rays

C

X-rays

D

`gamma`-rays.

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MODERN PUBLICATION-UNIT TEST-05-EXERCISE
  1. Electromagnetic waves of frequency 5 xx 10^(14) Hz are passed through ...

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  2. Which of the following are not electromagnetic waves?

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  3. If a source of power 4 kW produces 10^(20) photons per second,the radi...

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  4. Which of the following radiations has the least wavelength?

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  5. Infrared radiation are detected by:

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  6. This question has statement - 1 and statement -2.Of the four choicesgi...

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  7. An electromagnetic radiation of frequency v ,wave-length gamma,travell...

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  8. If epsilon0 and mu0 are the electric permittivity and magnetic permeab...

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  9. If epsilon0 and mu0 are the electric permittivity and magnetic permeab...

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  10. The electric and magnetic fields in an electromagnetic wave are

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  11. Electromagnetic waves Electromagnetic waves are those waves in which t...

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  12. The electric and magnetic fields associated with an electromagnetic wa...

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  13. Which of the following statements is false for the properties of elect...

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  14. The oscillating electric field of an electromagnetic wave is given by ...

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  15. The electric field of a plane electromagnetic wave in vaccum is repres...

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  16. Which of the following are not electromagnetic waves?

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  17. Which of the following has minimum wavelength

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  18. Arrange the given electromagnetic radiations in the descending order o...

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  19. The frequency of gamma-rays,X-rays and ultraviolet rays are a,b and c ...

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  20. According to Maxwell's hypothesis, a changing electric field gives ris...

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