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# Is it a Mechanical Wave? - PowerPoint PPT Presentation

Is it a Mechanical Wave?. Pick up a Telescope Quiz on the front table. You have five minutes to complete it . Please submit to your class In-Box. List characteristics of the electromagnetic spectrum. Describe how the electromagnetic spectrum is arranged.

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## PowerPoint Slideshow about 'Is it a Mechanical Wave?' - ida

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Presentation Transcript

• Terms

• Wavelength

• Frequency

• Medium

• Crest

• Trough

• Amplitude

• Transverse Wave

• Light & radio waves are both E.M. radiation, but each has properties that make it useful for some specific purpose.

• Characteristics of EM Waves How about trying to tune in a radio station on your TV?

• All Electromagnetic (EM) waves travel at the same speed

• All EM waves travel in wavelengths

• Each EM wave travels at different frequencies.

• Crest-Highest point of a transverse wave.

• Trough-Lowest point of a transverse wave.

Crest

Trough

• Amplitude-Distance between the midpoint of the wave and the crest.

• Measure of how much energy the wave is carrying

Crest

Amplitude

Trough

• The distance a wave travels in one cycle. The distance between two crests or two troughs.

Wavelength

Wavelength

• The number of waves that pass a given point in one second.

• Measured in Hertz=wavelengths/second

Crest

Trough

• Medium-Matter that is disturbed by energy. Spectrum is arranged.

• Chains of vibrating molecules through the medium.

• Kinetic energy moving the molecules; however, after passing the molecules come to rest in the same spot.