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Ozone layer protestes the living cells f...

Ozone layer protestes the living cells from

A

visible ligh

B

u.v. radiation

C

infrared radiation

D

microwave radiation

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The correct Answer is:
B
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AAKASH SERIES-ELECTROMAGNETIC WAVES-EXERCISE -IA
  1. When a low flying aeroplane passes over head, we sometimes notice a sl...

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

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  3. Ozone layer protestes the living cells from

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

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  5. Practically ozone layer absorbs the radiation of wavelength

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

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

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

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

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

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  11. Infrared radiations are detected by

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

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

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  14. The frequency from 3Hz to 30MHz is known as

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  15. The frequency from 3xx10^(9) Hz to 3xx10^(10) Hz is

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  16. A cube of edge a has its edges parallel to X, Y and Z -axis of rectang...

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  17. Green house effect is

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  18. One requires 11eV of energy to dissociate a carbon monoxide molecule i...

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  19. The ratio of contributions made by the electric field and magnetic fie...

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  20. An electromagnetic wave radiates outwards from a dipole antenna, with ...

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