PPT: Light - Reflection and Refraction

 Page 1


LIGHT : REFLECTION
AND REFRACTION
Class 10
Page 2


LIGHT : REFLECTION
AND REFRACTION
Class 10
L i ght
Light is a form of energy which helps us to see objects.
When light falls on objects, it reflects the light and when the 
reflected light reaches our eyes then we see the objects.
Light travels in straight line.
The common phenomena of light are formation of shadows, 
formation of images by mirrors and lenses, bending of light
by a  medium, twinkling of stars, formation of rainbow etc.
Page 3


LIGHT : REFLECTION
AND REFRACTION
Class 10
L i ght
Light is a form of energy which helps us to see objects.
When light falls on objects, it reflects the light and when the 
reflected light reaches our eyes then we see the objects.
Light travels in straight line.
The common phenomena of light are formation of shadows, 
formation of images by mirrors and lenses, bending of light
by a  medium, twinkling of stars, formation of rainbow etc.
Page 4


LIGHT : REFLECTION
AND REFRACTION
Class 10
L i ght
Light is a form of energy which helps us to see objects.
When light falls on objects, it reflects the light and when the 
reflected light reaches our eyes then we see the objects.
Light travels in straight line.
The common phenomena of light are formation of shadows, 
formation of images by mirrors and lenses, bending of light
by a  medium, twinkling of stars, formation of rainbow etc.
Reflection of light
When light falls on a highly polished surface like a mirror most of 
the light is sent back into the same medium. This process is called 
reflection of light.
Laws of reflection of light
The angle of incidence is equal to the angle of reflection. a.
The incident ray, the reflected ray and the normal to the
mirror at  the point of incidence all lie in the same plane.
b.
Page 5


LIGHT : REFLECTION
AND REFRACTION
Class 10
L i ght
Light is a form of energy which helps us to see objects.
When light falls on objects, it reflects the light and when the 
reflected light reaches our eyes then we see the objects.
Light travels in straight line.
The common phenomena of light are formation of shadows, 
formation of images by mirrors and lenses, bending of light
by a  medium, twinkling of stars, formation of rainbow etc.
Reflection of light
When light falls on a highly polished surface like a mirror most of 
the light is sent back into the same medium. This process is called 
reflection of light.
Laws of reflection of light
The angle of incidence is equal to the angle of reflection. a.
The incident ray, the reflected ray and the normal to the
mirror at  the point of incidence all lie in the same plane.
b.
Image formed by a plane mirror
The image is erect.
The image is same size as the object.
The image is at the same distance from the mirror as the
object is  in
front of it.
The image is virtual (cannot be obtained on a screen).
The image is laterally inverted.