Questions for chapter 3C Light | Answers for chapter 3C |
electromagnatic wave | a disturbance that transfers energy through a field |
radiation | the transfer of energy in the form of electromagnetic waves |
electromagnetic spectrum | the range of EM (electromagnetic) frequencies |
radio waves | EM waves with the longest wavelengths and lowest frequencies |
microwaves | EM waves with shorter wavelengths and higher frequencies than radio waves |
visible light | part of the EM spectrum that human eyes can see |
infrared light | part of the EM spectrum with frequencies between microwaves and visible light |
ultraviolet light | part of the EM spectrum with frequencies above visible light and below those of x-rays |
x-rays | part of the EM spectrum with very high frequencies |
gamma rays | part of the EM spectrum with the highest frequencies |
transmission | the passage of an EM wave through a medium |
absorption | the disappearance of an EM wave into a mediumscattering |
scattering | the spreading out of light rays in all directions |
polarization | the way of filtering light so that waves vibrate in the same direction |
prism | a tool that uses refraction to separate light into different wavelengths |
primary colors | the three colors of light--red,blue,and green--that can be mixed to make all the other colors and white |
primary pigments | the three colors of materials--cyan, yellow, and magenta--that can be mixed to make all the colors and black |