1. The problem statement, all variables and given/known data Estimate the radiation pressure due to a 100 W bulb at a distance of 8.4 cm from the center of the bulb. 2. Relevant equations Power= Work/Time W=Force(distance) Pressure = Force/Area = Poynting vector/speed of light 3. The attempt at a solution I found the cross sectional area by doing 4∏ r^2, so I have that. Then, seeing as I was given power and distance, I tried to figure out the Force in terms of Power and distance, but in doing that, I got the formula F= Power (Time)/distance, and I wasn't given the time. Is there some formula that I'm missing?