Waves in strings, reflections, standing waves and harmonics.
What are longitudinal wavesIn this case, Individual particles of wave move in direction of propagation of wavesIn easy language, particles of medium move back and forth (left and right) making nearby particles of medium vibrateExampleIf we stretch a slinky, it moves left and right (in the direction
Slinky coil can be used to demonstrate transverse wave.In transverse wave, the direction of the wave is perpendicular to the direction of the vibration of th...
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You know that feeling you get in your gut when you think something bad is about to happen? Or a feeling of paranoia when watching a horror film? These feelings are created through very careful manipulation of a few elements such as camera shots, use of music, silence etc. As it turns out, in many cases, the scariest sounds in horror films are in fact the ones we cannot hear. Sound designers are beginning to reveal that they are using what is called "infrasound" to make their movies seem more fr
The Wavelength, Frequency, Amplitude and Period of a Transverse Wave
Wave concepts and terminology for students and teachers. By Margaret Olsen, SouthEast COSEE Education SpecialistYou can download the glossary as a Microsoft Word document or an Adobe PDFWaveThe repeating and periodic disturbance that travels through a medium (e.g. water) from one location to another location.Wave characteristicsWave crestThe highest part of a wave. Wave troughThe lowest part of a wave. Wave heightThe vertical distance between the highest (crest) and lowest (trough) parts of a wave. WavelengthThe distance from a certain point on one wave to the same point on the next wave (e.g. distance between two consecutive wave crests or between two consecutive wave troughs). Wave amplitudeOne half the distance from the crest to the trough. Wave amplitude is a more technical term for wave height and is used in engineering technology. Wave frequencyThe number of waves passing a fixed point in a specified period of time. Frequency has units of waves per second or cycles per second. Another unit for frequency is the Hertz (abbreviated Hz) where 1 Hz is equivalent to 1 cycle per second. Wave periodThe time it takes for two successive crests (one wavelength) to pass a specified point. Wave speedThe distance the wave travels divided by the time it takes to travel that distance. Wave speed is determined by dividing the wavelength by the wave period. In symbols c = λBB; / T, where c is the wave speed, λ (lambda) is the wavelength, and T is the period. Wave SteepnessThe ratio of height to wavelength. When wave steepness exceeds 1:7, breakers form. If a wave has a height of one foot and a length from crest to crest of 8 feet, then the ratio is 1:8 and this wave is not going to break. But if the height is 1 foot and the length decreases to 5 feet, then the ratio is 1:5 and this wave has now become so steep that the crest topples and the wave breaks.Types of Ocean WavesCapillary wavesVery small waves with wavelengths less than 1.7 cm or 0.68 inches. They are the first waves to form when the wind blows over the surface of the water and are created by the friction of wind and the surface tension of the water. These tiny little waves increase the surface area of the sea surface and if the wind continues to blow, the size of the wave will increase in size and become a wind wave. ChopSmall waves causing the ocean surface to be rough. RipplesThe ruffling of the water’s surface due to pressure variations of the wind on the water. This creates stress on the water and results in tiny short wavelength waves called ripples. Ripples are often called capillary waves. The motion of a ripple is governed by surface tension. Standing WaveWaves that move back and forth (oscillate) in a vertical position. They do not move forward but appear as crests and troughs in a fixed position. Standing waves are created when a wave strikes an obstruction head-on and then are reflected backwards in the direction they came from. SwellThe smooth undulation (rising and falling of waves) of the ocean surface that forms as waves move away from the storm center where they are created. As waves move out and away from the storm center, they sort themselves out into groups of similar speeds and wavelengths. This produces the smooth undulating ocean surface called a swell. Swells may travel thousands of kilometers from the storm center until they strike shore.Other termsBeaufort ScaleA scale of wind velocity used for estimating the force or speed of winds. It is a numbered scale from 0 to 12 to describe wave size and sea conditions. The Beaufort Scale was developed by Rear Admiral Sir Francis Beaufort. 0 on the Beaufort scale represents the calmest of seas (the water is so smooth that it looks like glass). A 12 on the Beaufort scale represents hurricane force waves. BreakersWhen a wave approaches shore, it touches bottom and the front of the wave slows down and the back overtakes the front. This forces the water into a peak that curves forward. This peak will eventually fall forward in a tumbling rush of foam and water called a breaker. Waves break on or near shore or over reefs or offshore sandbars. There are three types of breaking waves: plunging breakers, spilling breakers and collapsing breakers. Breakers may be one or a combination of these types. Cat’s PawsA light breeze that ruffles small areas of a water surface. FetchThe uninterrupted area or distance over which the wind blows (in the same direction). Fetch is important because the interrelationship between wind speed and duration, both functions of fetch, is predictive of wave conditions. Orbital depthThe depth to which the orbital motion of the wave energy can be felt. This depth is equal to half of the wavelength. At the sea surface, orbital diameter is equal to wave height. As depth increases, less wave energy can be felt. The orbital depth is the depth where zero energy remains. For example, if a wave at the surface has a height of 4 meters and a wavelength of 45 m, then the depth where no motion from the wave exists is 45/2 or 22.5 meters. SeasA chaotic jumble of waves of many different sizes (wave heights, wavelengths, and periods).
We demonstrate the Doppler Effect where a traveling transmitter excites spherical waves in fixed time intervals. While a frequency increase in the direction ...
Find out about the various types of waves. What types of waves are sound, electromagnetic, brain, seismic, mechanical, and surface waves.
Waves are a transfer of energy that can be described as vibrations (or oscillations) about a rest point. Below is a list of key definitions
Waves are a transfer of energy that can be described as vibrations (or oscillations) about a rest point. Below is a list of key definitions
Make a mini wave machine using toothpicks and jelly tots. A super simple transverse wave demonstration for kids
Make a mini wave machine using toothpicks and jelly tots. A super simple transverse wave demonstration for kids
What a mechanical wave is and what it travels through, and different types of mechanical waves.
Physics T-Shirt Where can I find other physics designs? Expand or collapse section. In addition to physics designs, you can explore the marketplace for scientist, biology, and chemistry designs sold by independent artists. What material is this item made of? Expand or collapse section. 100% combed ringspun cotton. The perfect fabric for a graphic tee and the softest in the business. (Due to product availability, cotton type may vary for 2XL and 3XL sizes) Learn More » What USA ship methods are available? Expand or collapse section. Standard (6-8 Business Days) FedEx Air (4-6 Business Days) Estimates include printing and processing time. More Shipping Info » What is the Return/Exchange policy? Expand or collapse section. We want you to love your order! If for any reason you don't, let us know and we’ll make things right. Learn More »
Georgia Performance Standards SPS9. Students will investigate the properties of waves. a. Recognize that all waves transfer energy. b. Relate frequency and wavelength to the energy of different types of electromagnetic waves and mechanical waves. c. Compare and contrast the characteristics of electromagnetic and mechanical (sound) waves. d. Investigate the phenomena of reflection, refraction, interference, and diffraction. e. Relate the speed of sound to different mediums. f. Explain the Doppler Effect in terms of everyday interactions.
