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P1.5-Waves
Fichas del conjunto (11)
- 1What is a wave?A wave is a disturbance that transfers energy in the direction it moves without transferring matter.
- 2What are the two types of waves?1.Transverse
2.Longitudinal
- 3Give me an example of a 1. transverse and 2. longitudinal wave.1.Water waves, radio waves, light rays, gamma rays...
2. Sound, earthquake waves (P)...
- 4What is the amplitude of a wave?The amplitude of a wave is the hight of the waves crest (highest point) from it's undisturbed position.
- 5What is the wave equation?Wave speed (m/s) (V) = Frequency (Hz) (f) * Wavelength (m)
- 6Explain briefly: 1. reflection, 2. refraction, 3. absorption.1. Reflection is when a wave bounces off a surface e.g.: mirror.
2. Refraction is when a wave enters a different medium and changes speed and direction.
3. Absorption is when a wave loses it's energy to a surface and ceases to exist. - 7What is the normal line?A normal line is an imaginary line which is drawn perpendicularly to the point at which a ray reflects or refracts of a surface.
- 8What is the angle of reflection always equal to?The angle of incidence
- 9What happens to a wave when it is refracted?The waves' wavelength decreases and it bends towards the normal line when it enters a denser medium. When a wave leaves the denser medium it's wavelength increases and the wave bends away from the normal line.
- 10How can refraction change the way we see things underwater?Underwater things look closer than they are for example water would look shallower.
- 11What is the Doppler effect?The Doppler effect is when a wave source is moving therefore changing the waves' wavelengths. The waves moving in the direction of the wave source will get a shorter wavelength. Waves moving in the opposite direction will get a longer wavelength. This can change the way we hear or see things.
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- Fichas sobre P1.5-Waves, creado por Kirill Romanenko el 24/10/2015.
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- Kirill Romanenko
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