Physics Questions

Convex mirror is used as rear view mirror in vehicles. Because the image is smaller, more image can fit onto the mirror, so a convex mirror provides for a larger field of view than a plane mirror. This is why they are useful.

In order of increasing penetration power, alpha particles have the lowest, then beta particles, then gamma rays.

As  the  capacitance  is  charged  by the  factor  equal  to  the  value  of dielectric constant, Hence, C’ = kC = 7C

According to wave theories, for Total internal reflection tohappen: Light must travel from denser medium to rarer medium. Angle of incidence should be greater than critical angle. As in case of TIR, the image is perfectly clear, it implies that there has been no loss of intensity.