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Q.

The yellow light emitted from a sodium lamp has a wave length of 580 nm. Correct statement about the radiation is 

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a

frequency of radiation is 1.72 x 106 s-1

b

product of it's frequency and wavelength is 3 x 108 ms-1

c

frequency of radiation is 51.7 x 1014 s-1

d

wave number of radiation is 5.17 x 1014 m-1

answer is D.

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Detailed Solution

product of it's frequency and wavelength of an electromagnetic radiation is its velocity which is equal to velocity of light  3 x 108 ms-1

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