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An electron has kinetic energy 2.8 xx 10...

An electron has kinetic energy `2.8 xx 10^-23 J` de-Broglie wavelength will be nearly.
`(m_e = 9.1 xx 10^-31 kg)`.

A

`9.28 xx 10^(-4)m`

B

`9.28 xx 10^(-7)m`

C

`9.28 xx 10^(-8)m`

D

`9.28 xx 10^(-10)m`

Text Solution

Verified by Experts

The correct Answer is:
C
`E = (hc)/(lambda)`
or `lambda = (hc)/(E) =(6.62 xx 10^(-34) xx 3 xx 10^(8))/(2.14 xx 10^(-22))`
`= 9.28 xx 10^(-8)m`
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