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Which of the following waves has the lon...

Which of the following waves has the longest wavelength?

A

x rays

B

I.R rays

C

UV rays

D

radio waves

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The correct Answer is:
D
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AAKASH SERIES-ELECTROMAGNETIC WAVES-EXERCISE -IA
  1. Which of the following are not electromagnetic waves? (i) alpha-rays...

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

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

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

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

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

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

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

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

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  10. Ozone layer protestes the living cells from

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

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  12. Practically ozone layer absorbs the radiation of wavelength

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

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

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

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  16. The altitude of the ozone layer in the atmosphere and the ‘type’ of th...

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  17. Four atmospheric layers are given below, namely (i) stratosphere (ii) ...

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  18. Infrared radiations are detected by

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  19. Finger prints on a piece of paper may be detected by sprinkling fluore...

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  20. The atmosphere above the height of 80 km is called

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