1. The problem statement, all variables and given/known data Estimate the rms electric field in the sunlight that hits Uranus, knowing that the Earth receives about 1350 W/m2 and that Uranus is 19.2 times farther away from the Sun (on average) than is the Earth. 2. Relevant equations I=cεoErms2 E=V/d 3. The attempt at a solution Eearth=V/d Since Uranus is 19.2 times farther away then: Euranus=Eearth/19.2 Iearth = 1350 W/m2 Iearth=cεoEearth rms2 Euranus rms = Eearth rms / 19.2 = √ ( I / (cεo)) / 19.2 = 37.14 V/m I got this problem wrong several times so I just wanted to verify that I did it right this time. Thanks!