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Author Question: A helium-neon laser emits red light having a wavelength of 6.4 10-7 m and a power of 0.5 mW. How ... (Read 245 times)

lracut11

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on: Jul 28, 2018
A helium-neon laser emits red light having a wavelength of 6.4  10-7 m and a power of 0.5 mW. How many photons are emitted each second?
 a. 6.4  1038
  b. 1.6  1021
  c. 3.2  1025
  d. 2.6  1018
  e. 1.6  1015

Question 2

A solid state pulsed laser has an energy of 400 mJ per pulse. If its wavelength is 1.06  10-6 m, how many photons are in each pulse?
 a. 2  1025
  b. 2  1021
  c. 3  1018
  d. 6  1038
  e. 2  1018


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mohan

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Reply #1 on: Jul 28, 2018
Answer to Question 1

E

Answer to Question 2

E


lracut11

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Reply 2 on: Jul 28, 2018
Wow, this really help

jackie

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Reply 3 on: Yesterday
Excellent

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