The wave number of a spectral line is `5 xx 10^5 m^-1`. The energy corresponding to this line will be.

Options

A. `3.39 xx 10^-23 kJ`
B. `9.93 xx 10^-23 kJ`
C. `3.45 xx 10^-24 J`
D. None of these

Answer

B

Explanation

(b) Wave number of a spectral line `overline v = (1)/(lamda)`
Energy `= (hc)/(lamda)`
=`6.626 xx 10^-34 xx 3 xx 10^8 xx 5 xx 10^5`
=`9.93 xx 10^-23 kJ`.