1.

Pick out the correct increasing order of energy of electromagnetic waves from the following.(a) Einfrared < Emicro < Evisible < Eultraviolet < Egamma(b) Emicro < Einfrared < Evisible < Eultraviolet < Egamma(c) Emicro < Einfrared < Evisible < Egamma < Eultraviolet(d) Emicro < Einfrared < Eultraviolet < Evisible < EgammaI have been asked this question by my college director while I was bunking the class.Query is from Electromagnetic Spectrum in portion Electromagnetic Waves of Physics – Class 12

Answer»

Correct choice is (b) Emicro < Einfrared < Evisible < Eultraviolet < Egamma

The best I can explain: The energy of electromagnetic waves is DIRECTLY proportional to the frequency of the electromagnetic waves. So the order of frequency is GIVEN as:

vmicro < vinfrared < vvisible < vultraviolet < vgamma

Since E=hv ➔ E ∝ v

The order of energy is as FOLLOWS:

Emicro < Einfrared < Evisible < Eultraviolet < Egamma


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