The order-of-magnitude frequency for visible light is about 1015 Hz, which means

Question

The order-of-magnitude frequency for visible light is about 1015 Hz, which means that photonsofvisiblelighthavea kineticenergy ofthe order of a few eV. One of the most commonly used forms of electromagnetic radiation is microwave,s which have an order-of-magnitude frequency of about 1010 Hz. What would be the order-of-magnitude kinetic energy of a microwave photon?
1. 105 eV.
2. About 105 eV.
3. Still a few eV, the KE does not depend on frequency.
4. 1010 eV.
5. About a tenth of an eV..
6. Microwave photons have never been observed, and may not exist.

Explanation / Answer

here the frequency of microwave f = 1010 Hz

as we know that the magnitud eof kinetic energy

E = hf

where h is the plank constant h = 6.626 x 10-34 Js

so E = 6.626 x 10-34 x 1010

E = 6.626 x 10-24 J

E = 4.135 x 10-5 eV

so we can say that the order of kinetic energy is 10-5 eV

so option first is correct Ans

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