What is the refractive index according to class 12th?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
According to Class 12 physics curriculum, the refractive index is defined as:
"The ratio of the speed of light in vacuum to the speed of light in the medium"
Concepts covered include:
- Formula: n = c/v
- Snell's law: n₁ sin θ₁ = n₂ sin θ₂
- Absolute and relative refractive index
- Laws of refraction
- Critical angle and total internal reflection
- Applications in lenses and optical instruments
Students learn to solve numerical problems involving angle calculations, speed determinations, and lens applications.
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