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If the deBroglie wavelenght of an of a p...

If the deBroglie wavelenght of an of a photon of frequency `6xx 10 ^4`Hz ,then the speed of electron is equal to (Speed of light `=3 xx 10^8 m//s `
Planck's constant `=6.63 xx 10 ^(-34)` J s
Mass of electron `=9.1 xx 10 ^(-31)` kg

A

`1.45xx10^(6)ms^(-1)`

B

`1.1xx10^(6)ms^(-1)`

C

`1.7xx10^(6)ms^(-1)`

D

`1.8xx10^(6)ms^(-1)`

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The correct Answer is:
A
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