Chapters 14-15
Longitudinal, transverse, and mechanical.
Which of the following waves need a medium?
X-rays and gamma rays.
Which pair of waves have greater frequencies?
Radio waves and microwaves.
Which pair of waves have longer wavelengths?
longitudinal, transverse, and/or electromagnetic
What type of waves are light waves?
The energy increases, whereas the energy decreases respectively.
Describe what happens to the energy of an electromagnetic wave as the wavelength decreases. When it increases?
300,000,000 meters per second, or 3 x 10⁸ m/s.
How fast is the speed of light?
In which the particles are closer together.
In a longitudinal wave, what is the compression?
In which the particles are farther apart.
In a longitudinal wave, what is the rarefaction?
Radio Microwaves Infrared Visible light UV X-rays Gamma
List the parts of the electromagnetic spectrum.
A long wavelength will result in a low frequency, whereas a short wavelength constitutes a higher frequency.
Relate the frequency of the wavelength to the wave.
Transverse and mechanical
Water waves are what?
Used to kill carcinogens.
What are gamma rays used for?
TV remote control, night-vision, medical healing.
What are infrared waves used in?
Cell phones, microwave ovens.
What are microwaves used in?
Satellite communication, television signals, and radios.
What are radio waves used in?
Consists of oscillating electric and magnetic fields; does not require a medium...
What are the characteristics of an electromagnetic wave?
v = f x λ f = v/λ λ = v/f
What are the formulas for wave speed, frequency, and wavelength?
Particle model and wave model.
What are the two models of light?
Medicine, tanning beds
What are ultraviolet waves used for?
Machines like CD players, laser printers, photoelectric copying machines, facsimile machines.
What are visible light waves used for?
industry, taking a picture of your skeleton
What are x-ray waves used for?
A medium.
What do mechanical waves require to transfer energy?
Matter and energy
What do waves transfer?
As you move from left to right, the wavelength shortens as the frequency increases; whereas from right to left, the wavelength increases as the frequency lowers.
What happens as you move across the electromagnetic spectrum?
As the source moves away from the observer, its frequency decreases.
What happens to the frequency as the source of the sound moves away from the observer?
As the source of the sound moves away, the pitch is lowered.
What happens to the pitch as the source of the sound moves away from the observer?
refraction
What happens when light bends around an obstacle?
reflection
What happens when light bounces off an object?
diffraction
What happens when light travels from one medium to another?
A physical environment (eg water, air, space) in which phenomena occurs.
What is a medium?
The change in observed frequency and pitch as the source of the sound or the observer (can be both) move.
What is the Doppler effect?
The top of the wave.
What is the crest of a transverse wave?
The bottom of the wave.
What is the trough of a transverse wave?
The distance from one crest/trough to another.
What is the wavelength?
Transverse and longitudinal waves.
What other waves do mechanical waves include?
