Which surfaces reflect light better-rough or smooth?

Dark, rough, and dull surfaces absorb radiation better than light, smooth, and shiny surfaces.

State which surface of a plane mirror reflects most of the light incident on it: the front smooth surface or the back silvered surface.

A ring of mass m sliding on a smooth surface with velocity v_(0) enters rough surface with coefficient of kinetic friction mu_(k) , then

A block is released from rest from a height h=5m . After travelling through the smooth curved surface it moves on the rough horizontal surface through a length 1=8m and climbs onto the other smooth curved surface through a height h^' . If mu=0.5 , find h^' .

A ball is given a velocity v and angular velocity such that the ball rolls purely on a plank whose upper surface is rough enough to prevent slipping but lower surface contact with the ground is smooth. No other force is acting on system.

Give reasons for the following: Rough surface of a catalyst is more effective than smooth surface.

When all the parallel rays reflected from a smooth surface are parallel in one direction, is known as _____ reflection.

A cylinder executes pure rolling without slipping with a constant velocity on a plank, whose upper surface is rough enough, but lower surface is smooth. The plank is kept at rest on a smooth horizontal surface by the application of an external force F . The value of F is ?

A point source of light is placed at the centre of curvature of a hemispherical surface. The radius of curvature is r and the inner surface is completely reflecting. Find the force on the hemisphere due to the light falling on its if the source emits a power W.

When light is polarised by reflection from a transparent surface. a) reflection and refracted rays are mutually perpendicular b) both reflected and refracted rays are plane polarised c) refraction ray is partially polarised d) the R.I., of transparent surface is equal to tangent of Brewster.s angle