What is the frequency of a wave that has a wavelength of 250 m and a speed of 4230 m/s? Vw = f l Vw = 4230 m/s 4230m/s =f 250m l = 250 m 4230m/s = f 250m 16.92Hz =f 16.92/s =f
Today’s Objective: I understand the characteristics of the electromagnetic spectrum.
Need a medium to move through Mechanical Waves: Need a medium to move through Transverse Longitudinal
Did you see that? 15 min
What's the common factor?
Electromagnetic waves: On to… Electromagnetic waves: Waves of energy that are made up of changing electric and magnetic fields Hyperlink the wave for a video
Electromagnetic Waves: * Transverse waves: moves perpendicular to the direction the energy is traveling
Electromagnetic Waves: * Do not NEED a material to travel through * Termed radiation when traveling through space
electromagnetic waves The speed of ALL electromagnetic waves in a vacuum is 3.00 X 108 meters per second
Why do you see the lightning before the thunder?
Speed of Light: 671,000,000 mph Speed of Sound: 768 mph
Did you see the difference? 20
Waves arranged in order of wavelength & frequency Electromagnetic Spectrum: Waves arranged in order of wavelength & frequency
Greater frequency = more energy = Not Dangerous Greater frequency = more energy = more dangerous Roy G. Biv Dangerous
What do you notice about the waves of the water as they move away from the duck?
What happens to the sound of an ambulance as it passes by?
Nobody Says It Better....
Doppler Effect: Apparent change in frequency of waves
Changes In Waves
Constructive interference Term describing the combining of 2 or more waves to create a greater amplitude. Constructive interference
So what’s happening here? Term that describes a wave bending from entering a new medium So what’s happening here? Refraction
Trevor works at a radio station broadcasts a radio wave with a wavelength of 3.0 meters. What is the frequency of the wave?