Sound+light Flashcards
(28 cards)
What is sound?
Sound is a vibration that travels through air, water, or solid materials.
True or False: Sound can travel through a vacuum.
False
Fill in the blank: Sound requires a _____ to travel.
medium
What is the unit of sound intensity?
Decibel (dB)
What is the speed of sound in air at room temperature?
Approximately 343 meters per second.
What is pitch?
Pitch is the perceived frequency of a sound.
True or False: Higher frequency sounds have a lower pitch.
False
What is an echo?
An echo is a reflection of sound that arrives at the listener after a delay.
What is light?
Light is a form of electromagnetic radiation visible to the human eye.
What is the speed of light in a vacuum?
Approximately 299,792 kilometers per second.
Fill in the blank: Light can travel through _____ but sound cannot.
a vacuum
What is the visible spectrum?
The range of wavelengths of light that can be seen by the human eye.
True or False: All colors of light travel at the same speed in a vacuum.
True
What is refraction?
Refraction is the bending of light as it passes from one medium to another.
What is reflection?
Reflection is the bouncing back of light when it hits a surface.
What is the formula for calculating the speed of sound?
Speed = Distance / Time.
What do we call the highest point of a sound wave?
Crest
What is a wave?
A wave is a disturbance that transfers energy from one place to another.
True or False: Light waves are longitudinal.
False
What type of wave is sound?
Longitudinal wave
What is amplitude in relation to sound?
Amplitude is the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
What is the main difference between sound and light?
Sound requires a medium to travel; light does not.
What is a sound wave’s frequency measured in?
Hertz (Hz)
