Laws of refraction|Snell's Law|| What is Refrective index
Автор: Aspire to Inspire
Загружено: 2025-12-25
Просмотров: 132
LAWS OF REFRACTION & REFRACTIVE INDEX | PHYSICS
In this video, we study the Laws of Refraction and Refractive Index, which are very important concepts in Light (Optics).
These concepts help us understand how light bends when it passes from one medium to another.
🔹 Why do we study Laws of Refraction & Refractive Index?
• To understand the bending of light (refraction)
• To explain phenomena like apparent depth, bending of pencil in water
• To solve numericals in board exams
• This topic is the base of lenses, prisms, and optical instruments
🔹 What is taught in this video?
• First Law of Refraction
• Second Law of Refraction (Snell’s Law)
• Meaning of Refractive Index
• Formula of refractive index (n = sin i / sin r)
• Relation of refractive index with speed of light
• Numerical problem basics explained
🔹 Important Formula (plain text):
Refractive Index (n) = sin i / sin r
OR
n = speed of light in vacuum / speed of light in medium
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