The electric potential inside a charged spherical conductor of radius R is given by V = keQ/R, and potential outside is given by V = keQ/r. Using Er = -dV/dr, derive the electric field (a) inside and (b) outside this charge distribution.

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.