WAVES. Physical Science Chapter 11. Wave Medium Mechanical wave Electromagnetic wave Transverse wave Longitudinal wave Crest Trough Amplitude Wavelength. Period Frequency Wave Speed Doppler Effect Pitch Reflection Diffraction Refraction Interference Standing wave.
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A rainbow is an example of electromagnetic waves of visible light.
The colors of the spectrum can be seen in a rainbow.
Damped harmonic motion: A vibration that fades out as energy is transferred from one object to another.
A good example would be a stadium wave. The people would be moving at a right angle to the direction of the wave.
Light waves are transverse waves.
The electric and magnetic fields are perpendicular to the direction the light travels.
Longitudinal waves: the particles of the medium vibrate parallel to the direction of the wave.
Sound waves are a good example of a longitudinal wave.Transverse and Longitudinal Waves
Our eyes can detect light with the frequencies ranging from 4.3 x 1014 Hz to 7.5 x 1014 Hz.
Cones in our eyes are receivers for these tiny visible light waves. The Sun is a natural source for visible light waves and our eyes see the reflection of this sunlight off the objects around us. The color of an object that we see is the color of light reflected. All other colors are absorbed.
V = λ / T
Wave speed can also be calculated by multiplying frequency times wavelength or
V = f x λ
Frequency, f = 264 Hz
Wavelength, λ = 1.30 m
Unknown: wave speed v = _______m/s
Reverse the formula you just used and show the formula for frequency.
F = v / λ
The arrangement of particles in a medium determines how well a wave travels through it. Kinetic theory explains this. Molecules of gases are further spread apart then liquids or solids.
Two waves of the same size may completely cancel each other out. The amplitudes must be the same.
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