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Q.

If threshold wavelength for ejection of electron from metal is 660Ao,then work function for the photoelectric emission is

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a

1.2×10-18J

b

3×10-11ergs

c

3×10-18J

d

Both (2) & (3)

answer is D.

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Detailed Solution

W=hνo=hCλ0=6.6×10-34×3×108660×10-10=3×10-18J=3×10-11ergs
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