Question

A microwave operates at 7.42 mm wavelength. How much energy is produced in Joules from 359 photons?

answer numerically using scientific notation with e and significant figures.

Answer 1

`E=9.62* 10^(-21)\ J`

Step-by-step explanation:

Given that,

The wavelength of a microwave is 7.42 mm or 0.00742 m

No. of photons, n = 359

We need to find the energy produced by this no of photons. It can be given by the formula as follows :

`E=(nhc)/(\lambda)\\\\E=(359* 6.63* 10^(-34)* 3* 10^8)/(0.00742)\\\\=9.62* 10^(-21)\ J`

or

`E=9.62e^(-21)\ J`

So, the required energy is
`9.62* 10^(-21)\ J`.