Question
Any radiation in the ultra violet region of Hydrogen spectrum is able to eject photoelectrons from a metal. Then the threshold frequency of the metal for a threshold λ=1R=911˙A,is nearly
Answer: Option A
:
A
c=νλ ; ν=cλ=3×108911×10−10
ν=3.3×1015HZ
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:
A
c=νλ ; ν=cλ=3×108911×10−10
ν=3.3×1015HZ
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