Optics Grade 10

Rectilinear Propagation of Light

Light that travels in straight lines

Shades of White Light

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Electromagnetic Spectrum

it shows all types of light energy from super low-energy waves to super high-energy ones

Examples of ElectroMag Spectrum

Radio, Microwave, Infrared, Visible Light, Ultraviolet, X-Ray, Gamma Rays

Visible Light Spectrum

The small part of the electromagnetic spectrum that our eyes can see, from red to violet

Wave

A disturbance that transfers energy from one point to another without transferring matter

Ways of Light Production

Incandescent, Electric Discharge, Phosphorescence, Fluorescence, Chemiluminescence, Bioluminescence, Triboluminescence, Light Emitting Diode

Incandescent

Light that is produced because of high temperature

Incandescent Light Examples

Light bulb, Heated stove

Electric Discharge

Producing light by passing an electric current through a gas

Electric Discharge Examples

Neon signs, Lightning

Phosphorescence

A material that stores UV light and releases it over time

Phosphorescence Light Examples

Glow-in-the-dark stickers, Safety exit signs

Fluorescence

Release of light immediately from UV light

Fluorescence Light Examples

Highlighters under UV light, Fluorescent tube lights

Chemiluminescence

Production of light from chemicals

Chemiluminescence Light Examples

Glow sticks, Forensic sprays

Bioluminescence

Production of light by organisms

Bioluminescence Light Examples

Fireflies, Jellyfish

Triboluminescence

Production of light from friction caused by scratching, crushing, or rubbing certain crystals

Triboluminescence Light Examples

Quartz crystals, Flint and steel

Light Emitting Diode

Production of light from an electric current flowing through it

Light Emitting Diode Examples

RGB lights, LEDs

SALT Description

Size, Attitude, Location, Type

Light

a form of energy that travels in waves and particles

Medium

Any physical substance that carries energy from one place to another

Color

Light in the visible spectrum that has different wavelengths

Luminous Objects

Emit their own light

Non-Luminous Objects

Reflect or scatter light from luminous sources

Mirror Objects

A frame and a shiny metal layer