| A | B |
|---|
| Electromagnetic waves are different from other types of waves in that they do not | need a medium. |
| When light passes through matter,it | slows down. |
| A contact lens is | transparent. |
| Electromagnetic waves with the longest wavelengths are | radio waves. |
| The process of changing the frequency or amplitude of radio waves in order to send a signal is | modulation. |
| When food molecules absorb microwaves,they vibrate faster and their | kinetic energy increases. |
| Your body gives off | infrared radiation. |
| Fluorescent bulbs glow when the phosphors inside absorbors | ultraviolet radiation. |
| Xrays are best absorbed by | bone. |
| Objects that partially scatter light that passes through them are called | translucent. |
