Introduction
Chapter Name : Ray Optics And Optical Instruments |
Sub Topic Code : 101_12_09_01_01 |
Topic Name : Introduction |
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Sub Topic Name : Introduction |
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Introduction
Optics is the branch of physics which involves the behaviour 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:
How does the eye function?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Eyes | Eyes are organs that detect light and convert it into electro-chemical impulses in neurons. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Lens | A lens is an optical device which transmits and refracts light, converging or diverging the beam. |
Real life uses :
Vision.
Places to visit :
Magnifying glasses.
Practical examples around us
| Examples | Explainations |
|---|---|
| Refraction. | Refraction is the change in direction of a wave due to a change in its optical medium. |
What you learn in Theory:
The simplest photoreceptor cells in conscious vision connect light to movement.
What you learn in Practice:
The simplest "eyes", such as those in microorganisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms.