Why is the outer layer of optic fibre has refractive index of 1.48 and inner layer has refractive index of 1.5? Why didn't they have anyy other value of refractive index? How is it applicable to total internal reflection? ...
1.) Two +ve charges Q and 4Q are fixed at distance 12cm. Sketch lines of force and locate null point. 2.) Two point charges q and 4q are kept at a distance r from each other. While showing electric line plot indicate the neut ...
