Electrostatics

A charge is kept at the central point P of a cylindrical region. The two edges subtend a half-angle θ at P, as shown in the figure. When θ=30∘ , then the electric flux through the curved surface of the cylinder is Φ If θ=60∘ , then theelectric flux through the curved surface becomes Φ∕√n , where the value of n is _______.