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Momentum in a Box of Light

  • #1
48
9

Homework Statement



Question.png

Homework Equations


<S>=c[itex] \epsilon [/itex]E2/2

[itex] \Delta P = A \Delta t <S>/c [/itex]

The Attempt at a Solution


My question is if we need the "box height"? This is my work which I'm assuming is wrong. :C
New canvas.jpg



If there's another problem like this on here please put a link. I didn't see any, but my search terms may not have been ideal "Pressure of light in a box".
 

Answers and Replies

  • #2
DrClaude
Mentor
7,160
3,296
What is the momentum of the light? Why did 1400 W m-2 become 1000 W m-2? You didn't say why reflection doesn't change the answer.
 

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