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connor50

  • 3 years ago

How many photons are produced in a laser pulse of 0.819 J at 531 nm?

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  1. aaronq
    • 3 years ago
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    find the energy given by one photon of that wavelength E=hc/lambda divide the energy given 0.819 J by the energy of one photon

  2. connor50
    • 3 years ago
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    \[3.74 \times 10^-37\]?

  3. aaronq
    • 3 years ago
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    what energy did you get per photon

  4. aaronq
    • 3 years ago
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    0.000000000374 = 3.74*10^-10 J /photon

  5. connor50
    • 3 years ago
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    Divide that that by .819?

  6. aaronq
    • 3 years ago
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    the other way around 0.819 J/3.74*10^-10 J = # of photons

  7. connor50
    • 3 years ago
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    Ah.\[2.19\times10^9\]

  8. aaronq
    • 3 years ago
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    that sounds right

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