# Waves

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• Created by: rm715
• Created on: 10-03-16 21:14
Amplitude
Displacement of rest to crest
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Wavelength
Length of crest to crest
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Frequency
Number of complete waves produced from source/passing certain point each second
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Transverse waves
Oscillations are perpendicular [90°] to direction of energy transfer
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Longitudinal waves
Oscillations are parallel to direction or energy transfer
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Equation for Wave speed
Wavespeed [m/s] = Frenquency [Hz] x Wavelength [m]
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Law of Reflection
Angle of Incidence = Angel of Reflection [angles are always measured between ray and normal]
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Plane mirrors
Image is - same size as object, same distance from mirror as object, is virtual and upright and laterally inverted (swapped round)
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Diffraction
Waves spread out to pass through a gap. The narrower the gap, the longer the wavelength and the more diffraction.
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Diffraction of light
Light has a very small wavelength so needs a small gap to diffract.
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Refraction
When a wave crosses a boundary between two mediums and changes speed. Denser = slows down+refracts towards normal. Less Dense = speeds up+refracts away from normal
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Triangular prisms
Different wavelengths refract by different amounts. Upon entering a triangular prism, white light disperses into different colours. Violet refracts most (longest wavelength)
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## Other cards in this set

### Card 2

#### Front

Length of crest to crest

Wavelength

### Card 3

#### Front

Number of complete waves produced from source/passing certain point each second

### Card 4

#### Front

Oscillations are perpendicular [90°] to direction of energy transfer

### Card 5

#### Front

Oscillations are parallel to direction or energy transfer