Question

Derive an expression for deviation through thin prism

Answer 1

Answer:a beam of white light AB is passed into a thin prism PQR.this beam of white light splite on entering the thin prism and form a broad patch of seven colour on a white screen s placed on the otger side of prism

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Explanation:

Answer 2

• White light when passed through a prism it split into seven constituent colours.
• Light changes speed as it travels from one medium to another.
• prism slows down light directly proportional to its wavelength as it enters into which causes rainbow effect.
• The different components of light was slowed down differently which are in proportional to the wavelengths.
• Hence the different colours Daviste from their course differently
• This difference in deviation for different colours causes the light to spilt into its constituent spectrum.