Question

Threshold energy for the photo electron emission of electron from a metal 3.026*10^-15J. if light of 4000A° is used will the electrens be ejected or not​

Answer 1

Answer:

Energy required for photoelectric emission

=hλ

λ=13×10

15

/sec

∴6.6×10

−34

×1.3×10

15

=8.58×10

−19

J

∴ B is correct

1×20

−20

J<thresholdenergy

Explanation:

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