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Physical science 12

QuestionAnswer
Wave a repeating disturbance or vibration that transfers energy through matter or space
Medium the material through which a mechanical wave travels
Transverse wave a wave in which the medium vibrates perpendicular to the direction the wave travels
Crest the highest point of a transverse wave
Trough the lowest point of a transverse wave
Longitudinal wave a wave in which the medium vibrates parallel to the direction the wave travels
Compression the point in which the medium pushes together In a longitudinal wave (densest point)
Rarefaction in a longitudinal wave, the point where the ‘coils’ are the least dense
Amplitude a measure of the energy a wave carries
Wavelength measure of the distance from one point on a wave to the next point that is the same part of the wave. Measured in meters
Frequency the number of wavelengths (wave cycles) that pass a point in one second measured in Hertz (Hz)
Wave speed the speed at which a wave travels, measured in meters/ second
Reflection the change in a direction of a wave a the meeting place of two different types of mediums so that the wave front returns into the medium from which it originated to another
Refraction bending of a wave caused by a change in its speed as it move from one medium to another
Diffraction occurs when an object cuases a wave to change directions and bend around it
Interference two or more waves overlap and combine to form a new wave
Seismic waves waves that pass through the earth that are created when part of the earth’s crust breaks (caused by an earthquake)
Doppler effect the difference in perceived frequency of a wave and the original frequency of the wave
Resonance adding energy at the natural frequency of an object.
Transverse the peak is the crest and the rest position should be a horizontal line down the middle of the wave
How do you determine the amplitude of a longitudinal wave? compare the density between the rarefaction and the compression
Comparison of electromagnetic and mechanical waves mechanical waves travel through matter for example: ocean waves, sound waves, and earthquakes. Electromagnetic waves can travel thorough matter and a vacuum for example: light waves, gamma rays, x-rays, radio, infrared, and ultraviolet
Relationship between wavelength and frequency as frequency of wave increases- wavelength decreases and vise versa
The speed of sound _________ as it moves from solid to liquid to gas. decreases
The speed of light __________ as it moves from solid to liquid to gas increases
Law of reflection angle of incidence- angle of reflection
Echo reflection of sound wave
Loudness amplitude of a sound wave
Pitch frequency of a sound wave
Created by: Crayford