Unit 10 Light - EM waves only

Electromagnetic (EM) or light waves travel as what type of waves

• Longitudinal Waves
• Transverse Waves

When light hits a medium 

• it does not change.
• will speed up. 
• can reflect, refract, transmit, absorb or scatter
• diffract around the medium

Humans can only see

• visible light.
• infrared light.
• ultraviolet light.
• visible, infrared and ultraviolet.

Which color of light has the shortest wavelength? 

• red 
• blue 
• green
• yellow

Which can travel in the vacuum of space?

• EM (light) waves
• Sound waves

The EM wave with frequency higher than infrared and lower than UV.

• radio
• visible light
• xray
• gamma

7 is 

• Radio
• UV
• Infrared
• Gamma

4 is 

• radio
• UV 
• Visible Light
• X-ray

When the wavelength increases the frequency will

• increase
• decrease

EM waves  

• Must travel through a vacuum
• Can travel through a medium or a vacuum
• Are the same type of wave as mechanical waves
• Can only travel through a vacuum