Photoelectric qs

  • Thread starter crosbykins
  • Start date
  • #1
crosbykins
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0

Homework Statement



Would 449-nm blue light eject electrons from silver metal with a work function of 4.74 eV?

Homework Equations



E = hc/lamba

The Attempt at a Solution



E = [(6.63*10^-34 J*s)(3.00*10^8 m/s)]/(4.49*10^-7 m)
= 4.42*10^-19 J

4.42J/1.60*10^-19 J/eV
= 2.77 eV

Since 2.77 eV is less than the work function the blue light would not eject electrons from the silver metal.

***is this correct?? thanks for the help in advance! :)
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,223
31
Yes that is correct.
 

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