6 Waves move up and down in patterns that have high points called peaks. Transverse WavesWaves move up and down in patterns that have high points called peaks.The vibration is across the direction of the wave.
10 ElectromagneticA special type of transverse wave; energy that travels through space at 300,000,000 meters per second(Speed of Light)
11 Electromagnetic Spectrum Arrangement of electromagnetic waves by wavelengths and frequencies.Spans from short wavelength, high frequency, high energy waves to long wavelength, low frequency, low energy waves.
12 Light is part of the electromagnetic spectrum. The electromagnetic spectrum is a wave of energies with different frequencies.
13 It is the fastest mode of travel. Light is a form of energy that travels in electromagnetic waves.It is the fastest mode of travel.
15 Electromagnetic Spectrum Visible Spectrum – Light we can seeRoy G. Biv – Acronym for Red, Orange, Yellow, Green, Blue, Indigo, & Violet.Largest to Smallest Wavelength
16 Invisible Spectrum (Cont.) X-Rays Def. - EM waves that are shorter than UV rays.Uses: Medicine – Bones absorbx-rays; soft tissue does not.Lead absorbs X-rays.Your teeth absorb more of the X-ray energy than the rest of the mouth. The amounts of energy in different places make a picture of your teeth on the film.
17 Short Wavelength Microwave Invisible Spectrum (Cont.)Infrared RaysDef – Light rays with longer wavelength than red light.Uses: Cooking, Medicine, T.V. remote controls
18 The ultraviolet rays in sunlight can harm the skin. Invisible spectrum (cont.).Ultraviolet rays.Def. –EM waves with frequencies slightly higher than visible lightUses: food processing & hospitals to kill germs’ cellsHelps your body use vitamin D.The ultraviolet rays in sunlight can harm the skin.
19 Invisible spectrum (cont.) Gamma raysDef. Highest frequency EM waves; Shortest wavelength. They come from outer space.Uses: cancer treatment.
20 Def. – Longest wavelength & lowest frequency. Invisible SpectrumRadio WavesDef. – Longest wavelength & lowest frequency.Uses – Radio & T.V. broadcasting.Radio waves are not sound waves, but you can use a radio to hear music and voices.The radio and its speakers convert radio waves to an audio signal and then into sound waves.