- #1
lunus
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Homework Statement
For a science project, you would like to horizontally suspend an 8.5 by 11 inch sheet of black paper in a vertical beam of light whose dimensions exactly match the paper.
If the mass of the sheet is 1.0 g, what light intensity will you need?
Homework Equations
Equation I used: F = IA/c
The Attempt at a Solution
F = 9.8x10^-3 N
A = 6.03 m^2
c = 3.00x10^8 m/s^2
I = Fc/A
I = 4.87x10^7 W/m^2
This is my attempt at the solution. I think its correct but I would like to double check. I would appreciate any help. thank you