Question

The kinetic energy (ind) of a particle of mass
4.5x10-4 kg having a wavelength of 1000nm
is h = 6.62 x 10-14 Js) (AP Engg-2017)​

Answer 1

Answer:

KE=

2

1

mv

2

=4.55×10

−25

or

2

1

×9.1×10

−31

×v

2

=4.55×10

−25

or v

2

=

9.1×10

−31

2×4.55×10

−25

v=10

3

ms

−1

Applying de Broglie equation,

λ=

mv

h

=

9.1×10

−31

×10

3

6.6×10

−34

=0.72×10

−6

m.

Explanation:

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