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Properties of Waves. EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?. Vocabulary. Crest - The highest point, or peak, of a wave. Trough -The lowest point, or valley, of a wave.
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Properties of Waves EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Vocabulary Crest - The highest point, or peak, of a wave. Trough -The lowest point, or valley, of a wave. EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Properties of Waves • There are four wave properties • Amplitude • Wavelength • Frequency • Speed EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Wavelength is the distance from one crest or trough to the next. crest water level at rest fixed point Amplitude is the distance a medium moves above or below its position at rest. trough EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency? Frequency is the number of wavelengths passing a fixed point in a certain amount of time, usually 1 second.
Means trough in a transverse wave Means crest in a transverse wave EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Amplitude The maximum distance that a disturbance causes a medium to move from its rest position; the distance between a crest or trough of a wave and line through the center of a wave. Rope example: move your hand up and down at a greater distance, increases the amplitude. Uses more energy. Slinky – high vibrations cause the compressions to be more crowded and rarefactions loose giving the slinky higher amplitude. EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Which longitudinal wave has the larger amplitude? crowded Not very crowded EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency? Wavelength The distance between two corresponding parts of a wave
EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency? Frequency • The number of complete waves that pass a given point in a certain amount of time or the number of vibrations per second. • Hertz (Hz) – measures frequency. A wave that occurs every second has a measurement of 1 Hz. If two waves pass you every second then the measurement is 2 Hz • Example – if you move your hand slower, decreases frequency, move it faster increases frequency.
Speed • Waves in different mediums travel at different speeds • Ex. Light and sound- see a flash of lighting, hear a clap of thunder • Speed, wavelength and frequency related to each other by the formula Speed = wavelength x frequency EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Go Figure • The speed of a wave on a rope is 50 cm/s and its wavelength is 10 cm. What is the frequency? The speed of a wave on a guitar string is 100m/s and the frequency is 1000 Hz. What is the wavelength of the wave? EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
Class Work Homework • Fill in • What did I learn • Confused • Say • Read pages O 18 – O 23 Worksheet EQ: How do I describe the basic properties of waves? How is a wave’s speed related to its wavelength and frequency?
