Question

Calculate the energy of a photon of electromagnetic radiation whose frequency is 2.81×1014 s?1

Answer 1

Answer : The energy of a photon is
`18.619* 10^(-20)J`.

Solution : Given,

Frequency of a photon =
`2.81* 10^(14)s^-`

Planck' constant =
`6.626* 10^(-34)Js`

Formula used :

`E=h\\u`

where,

E = Energy of a photon

h = Planck's constant

`\\u` = Frequency of a photon

Now put all the given values in above formula, we get

`E=(6.626* 10^(-34)Js)* (2.81* 10^(14)s^-)`
`=18.619* 10^(-20)J`

Thus, the energy of a photon is
`18.619* 10^(-20)J`.