5 RADIO WAVESHave some of the longest wavelengths and lowest frequencies of all the EM wavesAre low energy waves
6 AM VS. FM WAVES Amplitude Modulation (A.M.) Frequency modulation (F.M.)Can travel farther than FMMore information can be encoded than AMCan reflect off the ionospherePasses through the ionosphereHave longer wavelengths than AMHave shorter wavelengths than AM
8 TV AND RADIO WAVESTV uses radio waves that have shorter wavelength and higher frequency than those used by radio stations.Most TV stations are broadcast using A.M. and F.M.F.M. waves carry sound; A.M. waves carry pictures
9 MICROWAVESHave shorter wavelength and higher frequency than radio waves.Carry more energy than radio waves.Microwaves are also used in radar (radio detection and ranging).
10 INFRARED WAVESHave shorter wavelengths and higher frequency than microwaves.Can carry more energy than microwaves and radio waves
11 INFRARED WAVES The Sun is a source of IR waves. Stars, planets, buildings, humans and trees also emit IR waves.
12 IR WAVESThe amount of IR radiation emitted by an object depends on the temperature of the object. Warmer objects give off more IR radiation than cooler ones.Your eyes cannot see IR radiation but there are devices that can detect it (i.e. night vision goggles)
14 VISIBLE LIGHT Humans can see it. The spectrum consists of ROYGBIV. Red, Orange, Yellow, Green, Blue, Indigo, Violet.White light is all of the colors of visible light combined.
15 VISIBLE LIGHTRed light has the longest wavelength of all the visible light. It carries the least amount of energy.Violet light has the shortest wavelength of visible light. It carries the most energy.
16 UV LIGHT Also produced by the Sun. Has shorter wavelength and higher frequency than visible light.Carries more energy than visible light.
17 EFFECTS OF UV WAVES Positive Effects Negative Effects Used to kill bacteria in foodOverexposure can cause sunburn, skin cancer, eye damageCauses skin cells to produce Vitamin DOverexposure can cause wrinkles and premature aging of the skin
18 X-RAYSHave the shortest wavelengths and highest frequency of all EM waves.X-rays carry a lot of energy and can penetrate many materials.Too much exposure to x—rays can damage or kill living cells
19 GAMMA RAYSCarry large amounts of energy and can penetrate materials very easily.Every day you are exposed to small amounts of gamma rays that do not harm you.Radiologists focus these on tumors to kill cancer cells.A negative effect of gamma radiation is that they kill healthy cells.