Question

What is the energy of an electromagnetic wave with a frequency of 8 x 10^12

Hz?
A. 4.2 x 10-22 J
B. 2.4 x 1021 J
C. 1.59 x 10-12
D. 5.3 x 10-21 J

Answer 1

D.
`5.3 * 10^-21 J`

Answer 2

Energy,
`E=5.3* 10^(-21)\ J`

Step-by-step explanation:

It is required to find the energy of an electromagnetic wave with a frequency of
`8* 10^(12)\ Hz`. The energy of a wave in terms of its frequency is given by :

`E=h\\u`

`\\u` = frequency of em wave

`E=6.63* 10^(-34)* 8* 10^(12)\\\\E=5.3* 10^(-21)\ J`

So, the energy of an electromagnetic wave is
`5.3* 10^(-21)\ J`