Mirrors and Lenses
Sound Waves
Harmonic Motion
Light Waves
Vocabulary
100
This property that causes light to bend as it travels from one medium to another is used in lenses.
What is refraction?
100
The pitch of a sound is directly related to this property of the wave.
What is frequency?
100
This term describes the time it takes for one complete cycle for a pendulum or wave.
What is the period?
100
This is the type of electromagnetic wave with the longest wavelength.
What are radio waves?
100
This term describes the distance from a point on one wave to the same point on the next wave.
What is the wavelength?
200
The law of reflection states that the angle of reflection (measured from a normal line) should be equal to this (also measured from the normal line).
What is the angle of incidence?
200
We use the unit "decibels" to measure this about a sound wave.
What is loudness?
200
This term describes how many cycles a pendulum or wave completes per second, and is measured in Hertz.
What is frequency?
200
This property is the same for all electromagnetic waves and is represented by the letter "c".
What is speed (or the speed of light)?
200
This term describes when a crest from one wave meets a trough from another, causing the waves to momentarily cancel each other out.
What is destructive interference?
300
A concave lens is also called this type of lens because it causes light rays to spread apart.
What is a diverging lens?
300
Because of this, the frequency of a sound wave gets higher as the source approaches you and lower as the source moves away.
What is the doppler effect?
300
This term describes how far a pendulum or wave moves from its stable position, and can be measured either as a distance or an angle.
What is amplitude?
300
This is the name used to describe particles of light (or electromagnetic radiation).
What are photons?
300
This term describes a light ray that comes in and hits an optical device (like a mirror or lens).
What is an incident ray
400
When light follows the path of a bent piece of plastic without leaking out, it's because of this property.
What is total internal reflection?
400
Unlike waves in a string, sound waves are this type of wave, because the vibrating air moves in the same direction as the wave motion.
What are longitudinal waves?
400
A pendulum with a period of 5 seconds will have this frequency.
What is 0.2 Hz (or 1/5 Hz)?
400
This type of electromagnetic wave can cause sun tans, but in larger amounts can also cause skin cancer.
What are ultraviolet rays?
400
This term describes the points on a standing wave that don't move.
What are nodes?
500
A curved mirror that is concave (also called a converging mirror) will bend light rays so that they do this.
What is bend together (or reflect toward a focal point)?
500
If a sound wave moves at 340 m/s and has a wavelength of 0.1 meters, this is the frequency of the wave.
What is 3,400 Hz?
500
If a pendulum swings with a frequency of 20 Hz, this is its period.
What is 0.05 seconds (or 1/20 seconds).
500
This type of electromagnetic radiation has the highest energy.
What are gamma rays?
500
This term describes the different frequencies that can produce a standing wave, all of which are multiples of the fundamental.
What are harmonics?
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