Question

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

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

$E=9.62\times 10^{-21}\ J$

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 :

$E=\dfrac{nhc}{\lambda}\\\\E=\dfrac{359\times 6.63\times 10^{-34}\times 3\times 10^8}{0.00742}\\\\=9.62\times 10^{-21}\ J$

or

$E=9.62e^{-21}\ J$

So, the required energy is $9.62\times 10^{-21}\ J$.