| A | B | 
|---|
| absorption | transfer of light energy to particles of matter | 
| reflection | light bouncing off an object | 
| diffraction | waves bending aroung barriers or through openings | 
| refraction | waves bending as they pass at an angle from one material to another | 
| scattering | interaction of light with matter that causes light to change direction | 
| constructive interference | two or more waves combining to make one wave with more height | 
| destructive interference | two or more waves combining to make one wave with less | 
| incidence | arrival of a beam of light at a surface | 
| gamma rays | EM waves that can be used to treat cancer | 
| ultraviolet light | An EM wave that can cause sunburn | 
| infrared waves | EM waves that make whatever they strike feel warmer | 
| visible light | light that you can see | 
| radio waves | EM waves used to broadcast television signals | 
| X rays | EM waves used to see inside suitcases without opening them | 
| microwave | EM waves used by cellular phones | 
| radiation | the transfer of energy as EM waves | 
| electromagnetic waves | changing electric and magnetic fields | 
| Earth's major source of energy | EM waves from the sun | 
| the color seen when looking at an opaque object | color of light diffracted | 
| the color seen when looking through a colored transparent object | color diffracted |