Vibrations and Waves
The time taken for an object to complete a back-and-forth vibration.
What is a period.
A term for the material that carries a wave's energy.
What is the medium.
Light is made up of the _________ and _________ fields, vibrating perpendicular to each other.
What are the electric and magnetic fields.
The color that we perceive light to be depends on its __________. (There are two acceptable answers to this question.)
What are frequency or wavelength.
What is the frequency of a wave with a period of 5 seconds?
What is 1/5 or 0.2 Hz.
The distance from a wave's crest to its equilibrium point.
What is the amplitude.
The term for regions of low pressure in a sound wave, the opposite of compression.
What is rarefaction.
The lowest frequency light waves are referred to by this term.
What is radio waves.
The additive primary colors are _______, _______, _______.
What are red, green and blue.
What is the wavelength of a 400 Hz sound wave, assuming that the speed of sound is 340 m/s?
What is 0.85 m?
This mathematical function describes the shape of wave motion.
What is the sine curve.
Sounds that are too high in frequency for humans to hear.
What is ultrasound.
An object is said to be __________ to a certain frequency if it naturally absorbs it and converts it into internal heat energy.
What is opaque.
The primary subtractive colors are ______, _______, and ______.
What are magenta, cyan and yellow.
A radio signal travelling from the moon to Earth and back takes 2.5 seconds to make the whole round trip. What is the distance from Earth to the moon? The speed of light is 300,000 km/s
What is 375,000 km.
Two waves overlapping each other will produce a(n) _________ pattern.
What is an interference pattern.
The phenomenon in which energy builds up in an object forced to vibrate at its natural frequency.
What is resonance.
An event where the shadow of the moon blocking the sun passes over Earth's surface.
What is a solar eclipse.
The blue color of the sky is caused by the _______ of sunlight.
What is scattering.
Blue light has a wavelength of 400 nanometers. What is its frequency? The speed of light is 300,000 km/s. 1 nanometer = a billionth of a meter.
7.5 *10^14 Hz, or 750 Trillion Hz.
The apparent change in a wave's frequency due to movement of its source towards or away from the receiver.
What is the Doppler Effect.
A rhythmic fluctuation in the volume of two sound waves of different frequency, caused by interference.
What are beats.
The region of the eye responsible for detecting light and sending it to the brain.
What is the retina.
The cyan color of water comes from its tendency to absorb _______ light.
What is red.
What pigments would I lay down on a white piece of paper to get the color red to appear?
What are magenta and yellow.