| A | B |
|---|
| crest | the top or highest portion of a transverse wave |
| energy | the ability to do work |
| medium | the substance that transfers energy from one substance to another |
| opaque | the characteristic of a material that does not allow light to pass through |
| prism | an object of transparent material with three straight faces at an angle to each other that refracts visible light into a spectrum |
| radiant | sending out rays of light |
| reflect | bouncing of a wave or ray off a surface, changing its direction |
| refraction | the bending of waves when they change speed while passing from one material to another at an angle |
| spectrum | a band of colors into which white light is separated according to wavelength, by being passed through a prism or other material |
| translucent | the characteristic of a material that allows some light to pass through, but that doesn’t allow objects on the other side to be seen clearly |
| transparent | the characteristic of a material that allows light to pass through, so that objects on the other side can be seen clearly |
| transverse | extending across something |
| trough | the bottom or lowest portion of a transverse wave |
| visible light | the only part of the electromagnetic spectrum seen by the human eye, near the center of the electromagnetic spectrum |
| wave | a disturbance or vibration that passes through a medium (such as air, water, or solid) transmitting energy without causing a permanent change to the medium |
| wavelength | the distance between one point on a wave to the same point on the next wave (usually crest to crest or trough to trough) |
