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NEET levelSingle correct optionDifficulty 1 of 3as008

The wavelength of radiation of frequency is (use )

  1. A20 nm
  2. B2000 nm
  3. C500 nm
  4. D200 nm

Answer: D

= c/ = (3.0e8)/(1.5e15) = 2.0e-07 m = 200 nm.
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