## Physics - Waves

### Gap-Filling Quiz

Type the answers (or copy and paste them) into the blank boxes.
You may press the Hint button to get the next letter. However, you will lose marks each time that you receive a hint.
When you have selected all of your answers, click on the "Check" button.
Good luck!
amplitude      coherent      direction      Doppler      frequency      higher      interference      larger      less      medium      parallel      perpendicular      standing      stationary      sum      ultrasonic      water      wavelength      waves
A transverse wave is a wave that travels to the direction of vibration of the particles. Waves in and waves in a spring are examples of a transverse wave.
A longitudinal wave is a wave that travels to the direction of vibration of the particles. Examples of longtitudinal waves are sound waves and waves.
The of a wave is the number of waves passing a point per second.
The velocity of a wave = frequency x .
Refraction is where a wave changes direction when it goes from one to another. Diffraction occurs when a wave changes after passing an obstacle. The longer the the greater the diffraction.
Interference occurs when two or more meet and a new wave produced, the resultant wave has a displacement equal to the algebraic of the individual displacements.
Constructive interference occurs when two waves combine to give a wave of amplitude. Destructive interference occurs when two waves meet to give a wave of smaller .
When two wave sources have the same frequency and are in phase, they are said to be . When waves from two coherent sources meet, the resultant pattern is called an pattern.
A wave occurs when two waves of the same frequency and amplitude, moving in opposite directions meet. The resultant wave is called a stationary wave or wave.
The Effect is the apparent change in the frequency of a wave due to the motion of the source of the wave. When the source is moving towards the observer, the apparent frequency is than the actual frequency, and when the source is moving away the apparent frequency is than the actual frequency.