If the kinetic energy of the particle is increased to 16

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If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is :

1. 25
2. 75
3. 60
4. 50

Correct Option: B

As we know

λ =	h	=	h
	P		√2 mK

(∴ P = √2 mKE )

Therefore the percentage change in de-Broglie wavelength

=	1 - 4	× 100 = -75%
	4