Physics

# Reflection of Light by Mirror

Experiment: Reflection of Light by Mirror

Task: Reflection of light by mirror.

Required accessories: A plane mirror and a torch-light.

Procedure: Keep the minor on the floor of the room in such a way that its face or the smooth surface remains upward. Throw light from the torch in a straight way on the mirror. This light will be reflected back from the mirror and fall straight to the roof. Now move the torch to through the light on the minor at an angle. You will see that when the angels are changing then the lights returning alter falling on the mirror are also changing their direction.

Analysis: Light always follows the law of reflection, whether the reflection occurs off a curved surface or off a flat surface. The angle created by the light falling on a minor with the normal is called the angle of incidence and the angle created by the light reflecting back from the mirror with the normal is called angle of reflection. It was found from the experiment that the angle of incidence is equal to the angle of reflection. That is, Angle of incidence = Angle of reflection.

Light reflects from a smooth surface at the same angle as it hits the surface. For a smooth surface, reflected light rays travel in the same direction. This is called specular reflection. For a rough surface, reflected light rays scatter in all directions. This is called diffuse reflection.