Lecture 22

Light, the Atmosphere & the Ozone Layer

Today's objectives -

• To learn about the light spectra.
• To learn the structure of the atmosphere.
• To learn why the ozone layer is important & why it is in danger

Vocabulary -

Atmosphere –
Stratosphere –
Troposphere –
Solar energy –
electromagnetic waves –
IR (infrared) –
UV (ultraviolet) –
visible light –
Ozone –
CFCs (chlorofluorocarbons) –

Lecture Outline -

   Composition of atmosphere
   Structure of the atmosphere
       Troposphere (<~15 km)
       Stratosphere (~15-40 km)
   The properties of light
       ultraviolet light
   The ozone (O₃) layer
       How it works & is destroyed