The energy of an electromagnetic radiati...

The energy of an electromagnetic radiation is `3 xx 10^(-12)` ergs. What is its wavelength in nanometers ? (`h = 6.625 xx 10^(-27)` erg.sec, `C = 3 xx 10^(10) cm.sec^(-1)`

A

400

B

228.3

C

3000

D

662.5

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The correct Answer is:

D

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