NEET Questions Solved

NEET - 2015

The energy of the EM wave is of the order of 15 KeV. To which part of the spectrum does it belong?


(b)Infrared rays

(c)Ultraviolet rays


Given energy of EM waves is of the order of 15keV
i.e. E=hv=h x cλ

=>λ=h x ce

=6.624x10-34 x 3x1018/15 x 10x 1.6x10-19

=1.3248 x 10-29/1.6x10-19


=0.828Å [∴1Å=10-10m]


Thus, this spectrum is a part of X-rays.

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