1. Nov 18, 2003 #1

   cantdophysics

   

   How much force (in Newtons) is exerted on a mirror when a 12.0W laser beam of red light (675 nm) strikes the mirror normal to its surface? (Assume no light is absorbed)
   
   How how how how???
   kthx

    

   cantdophysics, Nov 18, 2003
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3. Nov 19, 2003 #2

   Doc Al

   

   Staff: Mentor

   Hint: how would you solve the problem of a rubber bullet bouncing off a wall? Think Impulse = Force x Time = change in Momentum.
   
   Does light have momentum?

    

   Doc Al, Nov 19, 2003

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