REFRACTION OF LIGHT (2)

eduphysics
CBSE AND NEET

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TABLE OF CONTENTS

REFRACTION

REFRACTION – DEFINITION

Refraction is the peculiarity of twisting(bending) light starting with one medium then onto the next medium.

REFRACTION OF LIGHT – IMAGE

REASON FOR REFRACTION

The reason for refraction of light is because of the adjustment(change) of speed of light starting with one medium then onto the next.

At the point when the beam of light goes from rarer to denser , the the angle of incidence is more prominent(greater) than that of the angle of refraction. The refracted beam twists(bends) towards the normal.

At the point when the beam of light goes from denser to rarer,angle of incidence is less than the angle of refraction.The refracted beam twists (bends)away from the normal.

RARER TO DENSER BENDS TOWARDS THE NORMAL (RDT) DENSER TO RARER BENDS AWAY FROM THE NORMAL (DRA)

REFRACTIVE INDEX

Refractive index is the proportion of speed of light in vacuum to the speed of light in medium.

MEANING OF REFRACTIVE INDEX

• The refractive index provides data in regards to the guidance of direction of bending of light
• Gives important data about the critical angle.

REFRACTIVE INDEX VALUES

• For vacuum the value is 1
• For air the value is 1.003
• For water, the value is 1.33
• For glass the value is 1.5
• For diamond the value is 2.42

INSTANCES OF DAILY LIFE

• Spoon examines a glass of water (twisted)
• Starting precious stone (sparking diamond) (An expansion of refraction)

EXAMPLE

REFRACTION THROUGH A GLASS SLAB

REFRACTION THROUGH A GLASS PRISM

PHYSICS QUIZ:

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