Spherical Mirrors
Chapter Name : Light-Reflection And Refraction |
Sub Topic Code : 101_10_10_02_03 |
Topic Name : Spherical Mirrors |
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Sub Topic Name : Representation Of Images Formed By Spherical Mirrors Using Ray Diagrams |
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Introduction
We can obtain the various properties of images by ray diagrams. Rays of light when fall on the mirror, they follow certain rules.
Pre-Requisites:
Introduction to reflection and laws of reflection. Basic knowledge to image formation by spherical mirrors.
Activity:
Take any mirror and see the image of an object placed at the different positions and compare the results with the results from ray diagram.
Real Life Question:
“What type of mirror we use in the vehicles to the objects behind us?” “Why concave mirrors are used as reflectors?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Principal axis | It is the line, joining the focus and pole of the mirror. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Any curved mirror | Place the object at various positions and observe the image formed. |
Real life uses :
Concave mirrors are used in headlights of cars; dentist uses this type of mirror. While convex mirror is used in making sunglasses and also used in telescopes.
Places to visit :
Hallways of various buildings, Mirror mazes, fun houses,
Practical examples around us
| Examples | Explainations |
|---|---|
| Torches | Concave mirrors are used the torches to concentrate the light at one place. |
| ATMs | Convex mirrors are used in ATMs to see the happenings behind them. |
| Telescopes | Convex mirrors are used in the telescopes as well. |
What you learn in Theory:
A convex mirror always forms virtual and erect irrespective of the position of the object. We can observe the properties of the images formed by the help of ray diagram also.
What you learn in Practice:
Curved mirrors are very useful in day to day life. They are used in various instruments. Also they can be used directly to serve a purpose.