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10 Cards in this Set
- Front
- Back
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WHAT IS A WAVE? |
A REGULAR VIBRATION THAT CARRIES ENERGY |
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WDTM: WAVE LENGTH |
The wavelength ( ) of a wave is the length of one complete wave. The unit of wavelength is the metre. |
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WDTM: FREQUENCY |
The frequency () of a wave is the number of oscillations per unit time. |
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WDTM: HERTZ |
The unit of frequency is the hertz. |
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WDTM:PERIOD |
The period (T) of a wave is the time that it takes for one complete oscillation. The unit of period is the secon |
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WDTM: DIFFRACTION |
Diffraction occurs when a wave passes an edge, passes through a narrow gap or goes past an object.None of the properties of a wave are changed by diffraction. The wavelength, frequency, period and speed are same before and after diffraction |
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WDTM: SPEED OF WAVE |
The speed (v) of a wave is the distance travelled per unit time by the wave. The unit of speed is the metre per second, m s-1. |
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The speed, frequency and wavelength of a wave are linked by which relationship??? |
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WDTM:REFLECTION |
Reflection occurs when a wave bounces from the surface of an obstacle.None of the properties of a wave are changed by reflection. The wavelength, frequency, period and speed are same before and after reflection. The only change is the direction in which the wave is travelling. |
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WDTM:REFRACTION |
Refraction occurs when a wave moves from one material to another.The speed and wavelength are changed by refraction. The frequency and period of the wave stay the same. The direction in which the wave is travelling may or may not be changed by refraction. |
