Refraction through Prism💥PRISM🎯Part 4/5 Chapter 9 Ray optics 💥 Class 12 Physics
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CBSE Class 12 Physics
NCERT Chapter 9 Ray Optics & Optical Instruments
Ray Optics & Optical Instruments
Ray optics
Prism
Refraction through Prism
Total Internal Reflection in Prism
the angle of Minimum deviation in Prism
Relation between refractive index & angle of the prism
Numericals on Prism
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Chap 9 part 4 Ray Optics and Optical Instruments
00:00:00 Introduction
00:03:49 Refraction through a Prism
00:08:16 Refraction through a Prism: Deviation produced by a Prism
00:12:03 Derivation (Deviation produced by a Prism)
00:19:36 Variation of angle of deviation with angle of incidence
00:24:39 Relation between refractive index and angle of minimum Deviation
00:25:30 Derivation (Relation b/w refractive index and angle of minimum Deviation)
00:29:58 numerical
00:36:24 Deviation through a Prism of Small Angle
00:39:19 numericals
Refraction through a prism is an important topic in Class 12 Physics. It deals with the phenomenon of the bending of light as it passes through a triangular prism. This process is caused by the different speeds of light in different media and the variation in the refractive index of the prism material.
Let's discuss the refraction of light through a prism and the related concepts:
1. Refraction: Refraction is the bending of light when it travels from one medium to another with a different refractive index. The amount of bending depends on the change in the refractive index between the two media.
2. Prism: A prism is a transparent optical element with two triangular bases and three rectangular faces. It is typically made of glass or other transparent materials. Triangular prisms are commonly used to study refraction.
3. Incident Ray: The ray of light that initially approaches the prism is called the incident ray.
4. Refracted Ray: The ray of light that emerges from the prism after refraction is called the refracted ray.
5. Angle of Incidence: The angle between the incident ray and the normal (a line perpendicular to the surface of the prism) is known as the angle of incidence (i).
6. Angle of Deviation: The angle between the incident ray and the emergent ray is called the angle of deviation (d). It is the angle by which the incident ray is deviated from its original path.
7. Prism Angle: The angle between the two faces of the prism at the apex is called the prism angle (A).
8. Refractive Index: The refractive index (n) of a medium is the ratio of the speed of light in vacuum (c) to the speed of light in that medium (v). Mathematically, n = c/v.