Waves Flashcards
(25 cards)
What is the definition of a wave?
A wave is a disturbance that transfers energy through matter or space.
True or False: Waves can travel through a vacuum.
False
What is the formula for wave speed?
Wave speed = frequency × wavelength
Fill in the blank: The unit of frequency is _____.
Hertz (Hz)
What type of wave requires a medium to travel?
Mechanical wave
What type of wave does not require a medium?
Electromagnetic wave
What is the wavelength of a wave?
The distance between two consecutive points in phase on the wave.
True or False: The amplitude of a wave is related to its energy.
True
What is the relationship between frequency and wavelength?
They are inversely proportional.
What is a transverse wave?
A wave where the oscillation is perpendicular to the direction of wave travel.
What is a longitudinal wave?
A wave where the oscillation is parallel to the direction of wave travel.
Fill in the blank: The highest point of a wave is called the _____.
Crest
Fill in the blank: The lowest point of a wave is called the _____.
Trough
What is the principle of superposition?
When two or more waves overlap, the resultant displacement is the sum of the individual displacements.
What is resonance in the context of waves?
Resonance occurs when a system is driven at its natural frequency, resulting in a large amplitude.
Fill in the blank: The speed of light in a vacuum is approximately _____ m/s.
3 × 10^8
What is refraction?
The bending of a wave as it passes from one medium to another due to a change in speed.
What is diffraction?
The spreading out of waves when they pass through a narrow opening or around obstacles.
True or False: Sound travels faster in air than in water.
False
What is the unit of wavelength?
Meters (m)
What is the phase difference between two waves in phase?
0 degrees or 0 radians
What is constructive interference?
When two waves combine to make a wave with a larger amplitude.
What is destructive interference?
When two waves combine to make a wave with a smaller amplitude.
What is the formula for frequency if the period is known?
Frequency = 1 / period
