Source of Light

2. Source of Light
 Presented By: Annafee Addar Sam
 Class: 3
 Green Hill School

3. What is light?
 Light is electromagnetic radiation within a certain portion of electromagnetic
spectrum.

4. Sun is the main source of
Light

5. Sources of Light ?
 Sources of Light are things or Devices that produce light.
 Two types of light sources:
 Natural Source
 Artificial Source

6. Natural Source
of light
 Natural sources of light include the sun, stars, fire, and electricity in storms.

7. Artificial light is created by humans

8. There are even
some animals and
plants that can
create their
own light, such as
fireflies, jellyfish,
and mushrooms.
This is called
boiluminescence.

9. Incandescent lamps
incandescent lamp is composed of a glass bulb containing a metal wire filament

10. Halogen lamps
 The halogen lamp is filled with a halogen gas such as iodine (I) or bromine (Br).

11. Carbon arc lamps
 The carbon arc lamp comprises two tubular carbon (C) electrodes connected to an electric
voltage source, usually in the open air, with an electric current passing between them,
restricted by means of a mechanism known as a ballast.

12. Light Emitting Diode (LED)
lamps
LED has high level of brightness and power, no UV radiation

13. Not Light Source
Moon water Mirro

14. Thank you