Refraction of light — Chapter Summary
Maharashtra Board · Class 10 · Science
Summary of Refraction of light for Maharashtra Board Class 10 Science. Part of the Maharashtra Board Class 10 Science syllabus.
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Overview
Notice how a pencil partly dipped in water looks bent and how a coin seems to appear and disappear when water is added. These effects happen because light changes direction when it passes from one transparent medium to another. That change in direction is called refraction.
Key Concepts
Refraction is the change in direction
Refraction is the change in direction of light while going from one transparent medium to another transparent medium. A ray bends towards the normal w
In a rectangular glass slab
In a rectangular glass slab, the incident ray and emergent ray are parallel, but the emergent ray is displaced from the original path. At the first su
The first law says the incident
The first law says the incident ray, refracted ray, and normal lie in the same plane, with the incident and refracted rays on opposite sides of the no
Refractive index is a property
Refractive index is a property of a medium defined as the ratio sin i / sin r. It depends on the velocity of light in the medium and also on the colou
The refractive index of medium 2
The refractive index of medium 2 with respect to medium 1 is ^1n2 = v1 / v2. The reciprocal relation is ^2n1 = v2 / v1. This shows that light travels
Learning Objectives
- Explain refraction as the bending of light when it moves from one transparent medium to another
- State the laws of refraction and use Snell's law
- Understand refractive index and absolute refractive index
- Describe how light bends in different directions depending on the media
- Explain partial reflection, critical angle, and total internal reflection
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