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Q. Photons of an electromagnetic radiation has an energy 11keV each. To which region of electromagnetic spectrum does it belong ?

JEE MainJEE Main 2013Electromagnetic Waves

Solution:

E=hcλλ=hcE
λ=6.6×1034×3×10811×1000×1.6×1019
=12.4A˚
wavelength range of visible region is 4000\mathring{A} to 7800\mathring{A}.

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