Magnification
It is expressed as the ratio of the height of the image to height of the object
Few tips to remember sign convention for Spherical mirror
Refraction of Light
Refraction of Light : Happens in Transparent medium when a light travels from one medium to another, refraction takes place.
A ray of light bends as it moves from one medium to another
Refraction is due to change in the speed of light as it enters from one transparent medium to another.
Speed of light decreases as the beam of light travel from rarer medium to the denser medium.
Some Commonly observed phenomenon due to Refraction
1. The stone at the bottom of water tub appears to be raised.
2. A fish kept in aquarium appears to be bigger than its actual size.
3. A pencil partially immersed in water appears to be displaced at the interface of air and water.
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