L I G H T

1
L I G H T

• Light carries energy
• A light source (sun, light bulb) gives off light
  waves

www.howstuffworks.com/ light-bulb.htm
2
Light waves

• Are like the ripples in water when you drop a
  rock in it
• Go out in all directions
• Are called electromagnetic waves

3
Light Wave Lengths are

• The distance between the tops of two adjacent
  ripples

4
Frequency is

• The number of wave lengths that pass a point in
  one second. These are some examples of different
  wavelengths.

5
Electromagnetic Spectrum

• Electromagnetic waves are classified according to
  their wave lengths and frequencies
• There are many light waves that we cannot see
• We can only see a very small part of the
  electromagnetic waves

6
Electromagnetic Waves

• As the wave length decreases the frequency
  increases this decides what we can see.

7
Questions

• What is a light wave?
• What is a light wave length?
• What is meant by the frequency of a wavelength?
• How are electromagnetic waves classified?
• How much can we see of the electromagnetic
  spectrum of light?

8
Works Cited

• Imagine the Universe
• http//imagine.gsfc.nasa.gov/docs/science/know_l1/
  emspectrum.html
• electromagnetic wave lengths
• NASA Imaginers
• http//imagers.gsfc.nasa.gov/ems/waves2.html
• Animated wave lengths
• Visible light graphics
• Site Format
• http//www.siteformat.com/tutorials/photoshop/misc
  /waterripples.html
• blue ripple image
• Google
• http//images.google.com/images?qlightbulbsvnum
  10hlenlrieUTF-8oeUTF-8start100saN
• Light bulb picture
• Google
• Sun picture