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Author Question: The work function of a certain metal is 1.90 eV. What is the longest wavelength of light that can ... (Read 118 times)

theo

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on: Jul 27, 2018
The work function of a certain metal is 1.90 eV. What is the longest wavelength of light that can cause photoelectron emission from this metal?
 
  A) 231 nm
  B) 14.0 nm
  C) 62.4 nm
  D) 344 nm
  E) 653 nm

Question 2

How many orders are in the spectra formed by a grating with 3000. lines/cm illuminated by red light of wavelength 600. nm?
 
  A) 1
  B) 5
  C) 0
  D) 4
  E) 3


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guyanai

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Reply #1 on: Jul 27, 2018
Answer to Question 1

E

Answer to Question 2

B


theo

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Reply 2 on: Jul 27, 2018
Excellent

epscape

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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