ELECTROMAGNETIC WAVES &

SPEED OF LIGHT

Electromagnetic Spectrum

•The classification of electromagnetic waves according to frequency.

Electromagnetic Waves

•Energy carrying waves emitted by vibrating charges often electrons that is composed of oscillating electric and magnetic fields that generate one another.

Electromagnetic Waves

•Gamma rays•X-ray•Ultraviolet•Visible light (ROYGBV)

Electromagnetic Waves

• Infrared•Microwave•Radiowave

Electromagnetic Waves

•All EM waves move at the same speed in a vacuum and differ from one another in frequency and wavelenght.

Electromagnetic Waves

• longer wavelength=low frequency=low energy•Short wavelenght=high frequency=high energy

Electromagnetic Waves

• Gamma rays• X-ray• Ultraviolet• Visible light (ROYGBV)• Infrared• Microwave• Radiowave

Electromagnetic Waves

•The speed of all the waves in the EM spectrum is equivalent to the speed of light 299 792 453 m/s.

Electromagnetic Waves

•You know more about the electromagnetic spectrum than you may think.

Radio wave•Your radio captures radio waves emitted by radio stations, bringing your favorite tunes. Radio waves are also emitted by stars and gases in space.

Microwave•Microwave radiation will cook your popcorn in just a few minutes, but is also used by astronomers to learn about the structure of nearby galaxies.

Infrared•Night vision goggles pick up the infrared light emitted by our skin and objects with heat. In space, infrared light helps us map the dust between stars.

Visible Light•Our eyes detect visible light. Fireflies, light bulbs, and stars all emit visible light.

Ultraviolet•Ultraviolet radiation is emitted by the Sun and are the reason skin tans and burns. "Hot" objects in space emit UV radiation as well.

X-ray•A dentist uses X-rays to image your teeth, and airport security uses them to see through your bag. Hot gases in the Universe also emit X-rays.

Gamma ray•Doctors use gamma-ray imaging to see inside your body. The biggest gamma-ray generator of all is the Universe

CREATE A CONCEPT MAP

•Create a concept map about EM waves and speed of light.

3-2-1 EXIT CARD3-What have you learned today? Explain.

2-What life lessons have you gained from the topic?

1-What MI Activity did you learn the most from?