1. The problem statement, all variables and given/known data A hemispherical surface with radius e in a region of uniform electric field E has its axis aligned parallel to the direction of the field. Calculate the flux through the surface? 2. Relevant equations Flux = E A cos β 3. The attempt at a solution Why can't we say that the flux is E * Area of hemisphere which is E (2∏r^2)+(∏r^2) ??? Thanks for clarifying!