ELECTROMAGNETIC SPECTRUM

TYPES

• Radio Waves
• Microwaves
• Infrared radiation
• Visible light
• Uv light

TYPES CONT.

• X-rays
• Gamma Rays

WAVELENGTH

• The measure from crest to crest
• Blue has the shortest wavelength
• Red has the longest wavelength
• One wave is one full crest and one full trough

FREQUENCY

• Shorter frequencies have shorter wavelengths
• Longer frequencies have longer wavelengths
• A frequency is how often one full wave occurs

ENERGY

• Energy in a wave is higher in shorter frequency waves
• Colors like blue and violet have more energy than red and orange
• When waves have a smaller wavelength they have more energy
• Larger wavelengths have less energy

COLORS FROM HIGHEST ENERGY TO LOWEST

• Blue
• Green
• Yellow
• Orange
• Red

ACTIVITY

• Take a slinky with two people on each end
• Slowly move the slinky up and down until there is a small wave
• Then Shake the slinky up and down faster
• Wait for the slinky to return to you and then shake it again
• Repeat three times and observe

WHAT DID YOU NOTICE ABOUT THE WAVE WHEN YOU SHOOK IT SLOW?

• The wavelength was long
• The frequency was long
• It took less energy

WHAT DID YOU NOTICE ABOUT THE WAVE WHEN YOU SHOOK IT FAST?

• The wavelength was shorter
• The frequency was shorter
• It took more energy to make the wace move fast