Electrons are emitted with zero
velocity from a metal surface when it is exposed to radiation of
wavelength 6800 Å. Calculate threshold frequency (ν0 ) and work function
(W0 ) of the metal.
Answer:
Threshold wavelength of radian
= 6800 × 10-10 m
Threshold frequency of the metal
= 4.41 × 1014 s-1
Thus, the threshold frequency of the metal is 4.41 × 1014 s-1.
Hence, work function (W0) of the metal = hν0
= (6.626 × 10-34 Js) (4.41 × 1014 s-1)
= 2.922 × 10-19 J
Answer:
Threshold wavelength of radian
= 6800 × 10-10 m
Threshold frequency of the metal
= 4.41 × 1014 s-1
Thus, the threshold frequency of the metal is 4.41 × 1014 s-1.
Hence, work function (W0) of the metal = hν0
= (6.626 × 10-34 Js) (4.41 × 1014 s-1)
= 2.922 × 10-19 J
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