Relative Refractive Index - Light: Reflection And Refraction | Class 10 Physics 2022-23

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✅ In this video,

✔️ Class: 10th
✔️ Subject: Physics
✔️ Chapter: Light: Reflection And Refraction (Chapter 10)
✔️ Topic Name: Relative Refractive Index - Light: Reflection And Refraction | Class 10 Physics Chapter 10 (2022-23)
✔️ Topics Covered In This Video (by Vibhuti Ma'am): This YouTube video covers the topic of Relative Refractive Index from Class 10 Science as outlined in Chapter 10 for the 2022-23 syllabus. Learn about the properties of light and explore the concepts of reflection and refraction through guided explanations from Vibhuti Mam. Understand how the angle of light affects it's behaviour and how these behaviours can be used in physics in everyday life. Uncover the secrets behind light travelling in a straight line and how this is affected by different substances in its path. Get a useful overview of the topics most important for getting the perfect score in your exams!
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00:00 Introduction: Light: Reflection And Refraction
00:04 Relative Refractive Index
17:37 Website Overview
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Points covered in this video:-

Relative Refractive Index -
When light pases from one medium 1 to another medium 2, the refractive index of medium 2 with respect to medium 1 is written as (1n2) and is called relative refractive index;
1n2 = n2/n1 = (c/v2)/(1/v1) = v1/v2
1n2 = speed of light in medium 1/speed of light in medium 2
Similarly, refractive index of medium 1 with respect to medium 2 is:
2n1 = n1/n2 = (c/v1)/(1/v2) = v2/v1

Multiplying both equations we get;
1n2 x 2n1 = v1/v2 x v2/v1
1n2 = 1/ 2n1
i.e, refractive index of medium 2 with respect to medium 1 is reciprocal of refractive index of medium 1 with respect to medium 2.

For example, refractive index of glass with respect to air, i.e. ang = 3/2. Therefore, refractive index of air with respect to glass, i.e., gna = 1/(3/2) = ⅔

Similarly, refractive index of water with respect to air, i.e., anw = 4/3. Therefore, refractive index of ait with respect to water i.e., wna = 1/(4/3) = ¾

Again, refractive index of glass with respect to water is
wng = ng/nw = (3/2)/(4/3) = 9/8

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