The problem shows a picture of a surface of a half sphere. It is labeled surface 1 being the disk of the top of the half sphere. Surface 2 is the remaining surface of the half sphere. R is the radius. The magnetic field is uniform and makes an angle theta with the vertical (or with the normal of the disk). First I am asked to find the flux through surface 1. The B field makes an angle theta with the normal of the flat surface. This is an easy integration resulting in [itex]\Phi[/itex] = B cos θ ∏ R^2 The next part asks to find the magnetic flux through surface 2. This is more complicated because the angle between the normal of each dA is different. I have not been able to think of a way to relate the angle to the area in order to integrate. Thank you for any clues.