| A | B |
|---|
| visible spectrum | light energy that can be seen and can be broken into colors of light in the rainbow |
| ray | a narrow beam of light that travels in a straight line from a light source |
| transparent | allows light to pass through so that whatever is behind ccan be seen |
| translucent | allows light to pass through but scatters it so that whatever is behind cannot be clearly seen |
| opaque | does not allow light to pass through |
| absorb | to take in |
| reflect | to bounce back |
| transmit | to pass through or send |
| wavelength | the distance from a point on a wave to the same point on the next wave |
| vibrate | to move quickly back and forth |
| diffraction | the bending of light around a barrier or through an opening |
| refraction | when light hits an object and is bent and goes off in another direction |
| crest | high point of a wave |
| trough | low point of a wave |
| red | color with the lowest frequency |
| violet | color with the shortest wavelength |
| transverse waves | light waves and ocean waves |
| compression waves | sound waves |
| light waves | can travel through a vacuum |
| 300,000 km per second | speed of light |
| frequency | number of wavelengths in a given period of time |
