Total Internal Reflection
Chapter Name : Ray Optics And Optical Instruments |
Sub Topic Code : 101_12_09_04_01 |
Topic Name : Total Internal Reflection |
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Sub Topic Name : Total Internal Reflection |
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Introduction
Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it.
Pre-Requisites:
Optics
Activity:
A mirror.
Real Life Question:
What is reflection?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Reflection | Reflection is the change in direction of a wave front at an interface between two different media so that the wave front returns into the medium from which it originated. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Mirror | A mirror is an object that reflects light in a way that preserves much of its original quality subsequent to its contact with the mirror. |
Real life uses :
Vision.
Places to visit :
Bathroom.
Practical examples around us
| Examples | Explainations |
|---|---|
| A mirror | A mirror is an object that reflects light in a way that preserves much of its original quality subsequent to its contact with the mirror. |
What you learn in Theory:
Total internal reflection is a phenomenon that happens when a propagating wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.
What you learn in Practice:
If the refractive index is lower on the other side of the boundary and the incident angle is greater than the critical angle, the wave cannot pass through and is entirely reflected.