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Which of the following statement is true...

Which of the following statement is true ?

A

Velocity of light is constant in all media

B

Velocity of light in vacuum is maximum

C

Velocity of light is not same in all reference frames

D

Velocity of light in denser medium is greater than that in rarer medium

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The correct Answer is:
B
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AAKASH SERIES-ELECTROMAGNETIC WAVES-EXERCISE -IA
  1. Electromagnetic waves are transverse is nature is evident by

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  2. Choose the only wrong statement from the following about electromagnet...

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  3. Which of the following statement is true ?

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  4. An electromagnetic wave going through vacuum is described by E= E0 s...

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  5. Which of the following rays has minimum frequency?

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  6. Which of the following are not electromagnetic waves? (i) alpha-rays...

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  7. Which of the following electromagnetic waves has smallest wavelength?

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  8. Which of the following waves has the longest wavelength?

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  9. If u(E ) and u(B) be the time average of the electric and magnetic fie...

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  10. An electromagnetic radiation has an energy 14.4eV. To which region of ...

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

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  12. Assume that a lamp radiates power P uniformly in all directions. The m...

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  13. When a low flying aeroplane passes over head, we sometimes notice a sl...

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  14. A : If the earth did not have an atmosphere, its average surface temp...

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  15. Ozone layer protestes the living cells from

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  16. Ozone layer blocks the radiations of wave length: (1.) less than 3 × ...

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  17. Practically ozone layer absorbs the radiation of wavelength

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  18. A radiation of energy E falls normally on a perfectly reflecting surfa...

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  19. The type of electromagnetic wave propagation which is effected as a re...

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  20. X-rays are known as to be electromagnetic radi­ation. Therefore the X-...

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