Show:
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

The natural vibration of an object to a range of frequencies of sound is called __________.

What is resonance?

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

The light produced by the sun is a _____ white light, made up of other colors of light.

What are composite?

300

Sounds below 20 Hz are called _____.

What is infrasonic

400

The reflected image in a flat mirror is called __________ image

What is virtual image?

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)?

f = 1 / T

400
This type of electromagnetic wave can cause sun tans, but in larger amounts can also cause skin cancer.
What are ultraviolet rays?
400

What is the effect on amplitude called in constructive interference?

What is reinforcement?

500

The distance from the surface of a concave mirror to where a focused image  is formed is called the ________ length.

What is focal?

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?

f = v / λ

500

If a pendulum swings with a frequency of 20 Hz, this is its period.

What is 0.05 seconds (or 1/20 seconds).

T = 1 / f

500
This type of electromagnetic radiation has the highest energy.
What are gamma rays?
500

Waves that require a medium such as air, water, or another material are called ____________.

What are mechanical?