Reflection Of Light By Spherical Mirrors
Chapter Name : Ray Optics And Optical Instruments |
Sub Topic Code : 101_12_09_02_02 |
Topic Name : Reflection Of Light By Spherical Mirrors |
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Sub Topic Name : Sign Convention |
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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:
Spectacles.
Real Life Question:
What is a spherical mirror?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Spherical mirror | A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface. |
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 :
Car.
Practical examples around us
| Examples | Explainations |
|---|---|
| Passenger-side wing mirrors of cars. | These type of mirrors have wider fields of view than equivalent flat mirrors, but objects which appear in them generally look smaller (and, therefore, farther away) than they actually are. |
What you learn in Theory:
All distances measured above the principal axis are positive. Thus, height of an object and that of an erect image are positive and all distances measured below the principal axis are negative.
What you learn in Practice:
The distances measured in the direction of incident rays are positive and all the distances measured in the direction opposite to that of the incident rays are negative.