This document discusses the nature of light and the electromagnetic spectrum. It explains that light has wave-like and particle-like properties and is emitted or absorbed in quanta called photons. It also describes how white light disperses into a spectrum of colors when passed through a prism, and discusses the greenhouse effect whereby certain gases in the atmosphere trap heat radiation from the Earth's surface.

1. Nature of Light And
Electromagnetic Spectrum
Class X
Physics Chapter 15
By Miss Tehmina Faizan

2. Table of Content
 Nature of Light
 Dispersion
 Rainbow
 Spectrum
 Electromagnetic Spectrum
 Green House Effect

3. • Light is a form of energy.
• Light sometime behaves as particles and sometimes as waves.
• According to Quantum theory, light is emitted or absorbed in small quanta
(Packets of energy)called Photons.
• So light has DUAL NATURE.

4. “The phenomenon of splitting
white light into its constituent
colors is called DISPERSION.”

5. Dispersion And Recombination

7. The band of 7
colors formed due
to dispersion of
white light
through a prism is
called SPECTRUM

11. The greenhouse effect is
the process by which
radiation from a planet's
atmosphere warms the
planet's surface to a
temperature above what
it would be without its
atmosphere.