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The energy of an electromagnetic radiati...

The energy of an electromagnetic radiation is `19.875 xx 10^(-13)erg`. What is its wave number in `cm^(-1)`? `(h=6.625xx10^(-27)erg-s, c=3xx10^(10)cms^(-1))`

A

1000

B

`10^(6)`

C

100

D

10000

Text Solution

Verified by Experts

The correct Answer is:
d
Energy,`E=19.875xx10^(-13)erg`
`therefore` wave number,`overlinev=v/c=E/(hc)(therefore v=E/h)`
`=(19.875xx10^(-3))/(6.625xx10^(-27)xx3xx10^(10))=10^(14)`
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