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Q.

The de-Broglie wavelength of a particle of kinetic energy K is λ. What will be the wavelength of the particle, if its kinetic energy is K9?

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a

4λ

b

λ

c

2λ

d

3λ

answer is C.

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Detailed Solution

De-Broglie wavelength    λ=h2mK

When the kinetic energy is K9, then            λ' =h2mK9=3h2mK=3λ

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