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The de - Broglie wavelength of an electr...

The de - Broglie wavelength of an electron having `80 ev` of energy is nearly
`( 1eV = 1.6 xx 10^(-19) J`, Mass of electron ` = 9 xx 10^(-31) kg` Plank's constant ` = 6.6 xx 10^(-34) J - sec`)

A

140 Å

B

0.14 Å

C

14 Å

D

1.4 Å

Text Solution

Verified by Experts

The correct Answer is:
D
`lambda =12.27/sqrt(v)=12.27/sqrt(80)=1.4 Å`
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