Plane Surface

Assertion In refraction from a plane surface, if object is virtual, then its image will be real. Reason Plane surface always makes opposite natured image. If object is real, then image is virtual and vice-versa.

In a region of uniform electric field vec(E) = E_(0) hat (i) a semi cylinder is placed with it's rectangular shaped plane surface in y-z plane so that x-axis is normal to the plane surface. Given l is length and r is radius of cylinder the flux with curved surface alone is

A plano-convex lens, when silvered at its plane surface is equivalent to a concave mirror of focal length 28 cm . When its curved surface is silvered and the plane surface not silvered, it is equivalent to a concave mirror of focal length 10 cm then the refractive index of the mateiral of the lens is:

A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface in time t then average pressure exerted on the surface is (c = speed of light)

A plane surface is inclined making an angle beta above the horizon. A bullet is fired with the point of projection at the bottom of the inclined plane with velocity u, then the maximum range is given by:

An iron cylindar of base area 7 cm^2 and mass 10 kg is melted and reshaped into a into a rod of area of cross section 1cm^2 .Calculate the increase in the pressure exerted on a plane surface when both the cylinder and the rod are made to stand vertically on a plane surface (g= 10m^(-2))

When light of particular wavelength falls on a plane surface at an angle of incidence 60^(@) then the reflected light becomes completely plane polarised Find the refractive index of surface material and the angle of refraction through it.