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An electron beam has a kinetic energuy e...

An electron beam has a kinetic energuy equal to 100 eV.Find the wavelngth associated with the beam,if mass of elecron - `9.1 xx 10^(-31) kg 1 ev = 1.6 xx 10^(19) J` and Planck's constnat = `6.6 xx 10^(-34) J s`.

A

`1.2 overset @A`

B

`6.3 overset @A`

C

`24.6 overset @A`

D

`0.12 overset @A`.

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