electromagnetic spectrum by ms. merrikin. wave- up and down movement of energy from one place to...
TRANSCRIPT
electromagnetic waves (EM waves)-• Electric and magnetic energy • travel through empty space• Stars (our sun) emit every type of EM wave.
Extra Credit Assignment: Find and print your own EMS diagram for your notes Illustrate and draw your own EMS diagram using your notes.
Wave Name Properties / Effects
Uses Interesting Facts
Radio
Micro
Infrared
Visible
Ultraviolet
X-Ray
Gamma
USES: MRI Scans, Radio signals, TV broadcast, satellite communications. Emitted by radio antennae and by stars. May be sent by aliens?
EFFECTS: They have the lowest energy, so they are harmless.
USES: fast food heat lamps, finding people in the dark, measuring temperature
SOURCES: anything warm
Infrared spy camera
VISIBLE LIGHT - the only EM waves humans can SEE!
Makes up only a very small part of the EM spectrum!
Has medium wavelength and medium energy, so it is not harmful to organisms.
USES: tanning and hand dryers for bacteria disinfection, dentistry
EFFECTS: Has more energy than visible light, so it may damage skin cells, may cause cancer
SOURCES: Stars and UV lights (like the SUN)
Skin cancer on a man’s arm
USES: to see inside the body, to see inside luggage, to kill cancer cells, sterilize medical equipment
EFFECTS: Has a lot of energy, so it may damage DNA, may cause cancer
X-RAYS USES
EFFECTS: may damage DNA, may lead to cancer or radiation sickness
SOURCES: radioactive elements (U, Ra, Cs-137, Ir-92, Co-60,K-40,Tc-99), nuclear explosions, stars, supernovae
GAMMA RAYS