REFRACTION OF LIGHT : REFRACTION OF LIGHT Refraction is the bending of light rays when passing from one transparent medium to another
Slide 2 : Welcome
Slide 3 : We see a verity of objects in the world around us.
But we are unable to see anything in the dark room.
During day sunlight help us to see objects.
An object reflects the light that falls on it. This reflected light ,when received by our eyes enables us to see things.
Slide 4 : By observing common optical phenomena around us
Image formation by mirrors
The twinkling stars
The beautiful colors of rainbow
Bending of light by a medium……….
We may conclude that …..
. : . Light seems to be travel in straight lines.
Slide 6 : Light seems to travel along straight line paths in a transparent medium.
What happens when light enters from one transparent medium to another???
Refraction of light : Refraction of light
Slide 8 :
Slide 9 :
Slide 10 :
Slide 11 : Let us consider the case of the apparent displacement of a pencil, partially immersed in water . The light reaching you from the portion of the pencil inside water seems to come from a different direction, compared to the part above the water.
Slide 12 : REFRACTION IS DUE TO CHANGE IN THE SPEED OF LIGHT AS IT ENTERS FROM ONE TRANSPARENT MEDIUM TO ANOTHER
Refraction of light : Refraction of light Refraction is the bending of light rays when passing from one transparent medium to another.
REFRACTION THROUGH A GLASS SLAB : REFRACTION THROUGH A GLASS SLAB
Refraction through a glass slab : Refraction through a glass slab
Slide 16 : Experiments shows that refraction of light occurs according to certain laws.
The incident ray , the refracted ray and the normal to the interface of two transparent media at the point of incidence , all lie in the same plane.
The ratio of sine of angle of incidence to the angle of refraction is a constant, for the light of a given colour and for the given pair of media
Slide 17 : Thank you