Flashcards
Properties of Waves: Reflection, Refraction and Diffraction
Flashcards do conjunto (25)
- 1Examples of Transverse Waves in NatureLight waves, radio waves, water waves, secondary wave in earthquakes, gamma waves.
- 2When light moves from a less dense to a more dense medium...The light bends towards the normal.
- 3When light moves from a more dense medium to a less dense medium...The light bends away from the normal.
- 4Conditions Required for Total Internal Reflection1. Moving from a more optically dense medium into a less optically dense medium.
2. Angle of incidence must be greater than the critical angle. - 51. Low Frequency means... 2. Louder sound means... 3. Louder pitch means...1. Large wavelength and vice versa.
2. Less frequent/ less waves.
3. Higher amplitude and vice versa. - 6Diffuse ReflectionOccurs when parallel rays of incident light are reflected in all directions. Happens because the reflected surface is rough.
- 7Shadows Occur Because...Light travels in straight lines and part of the light is blocked off by an object in it's path.
- 8ReflectionThe phenomenon where a wave changes direction after colliding with a barrier.
- 9DiffractionThe bending and spreading of a wave around the edge of an object.
- 10WavefrontA line that represents the peak of a wave.
- 11Wave Speed (V)A measure of how fast a wave is travelling.
- 12LoudnessA term used to describe the amplitude of a sound wave.
- 13PitchA term used to describe the frequency of a sound wave.
- 14PeriodThe time it takes for one entire wave to travel past a point.
- 15FrequencyThe number of waves that travel past a point per second.
- 16WavelengthThe distance between successive peaks or troughs of a wave.
- 17AmplitudeThe maximum extent of a vibration or oscillation measured from the position of the equilibrium.
- 18Peak/CrestThe maximum distance above the equilibrium position that a transverse wave oscillates.
- 19TroughThe maximum distance below the equilibrium position that a transverse wave oscillates.
- 20Equilibrium PositionThe position the particles sit if they are undisturbed.
- 21CompressionA section of a longitudinal wave where the particles are close together.
- 22RarefactionA section of a longitudinal wave where the particles are spread out.
- 23TransverseA type of wave that oscillates perpendicular to the direction the wave is travelling. An example of a longitudinal wave is an ocean wave.
- 24LongitudinalA type of wave that oscillates parallel to the direction the wave is travelling. An example of a longitudinal wave is any type of sound wave.
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