b]1. The problem statement, all variables and given/known data[/b] Estimate the radiation pressure due to a 75 Watt bulb at a distance of 8 cm from the center of the bulb. 2. Relevant equations S=(E x B) , P = S/c 3. The attempt at a solution I'm not sure were to start. How can I determine the value of E from a 75 Watt bulb.