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Which is a way that acoustic engineers attempt to limit destructive interference of reflected sound waves in an auditorium?
Wiki User
∙ 8y ago
Designing a space with a sound-absorbing tiles
Jo Kub
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Explain the principles behind the reason why you see colors on soap bubbles?
This works through interference patterns. The wall of the soap bubble is very thin - on the order of the wavelength of the light. This makes the interference patterns noticeable. The interference is caused between the light that is reflected from the front part of the bubble wall, and from the light reflected from the back part of the bubble wall.
What causes the spectrum of colors seen in gasoline splotches on a wet street?
That is caused by constructive and destructive interference, between the light that gets reflected from the upper and the lower side. Normal daylight is a mix of many different colors, which have different wavelengths; therefore, the different colors will be affected differently in a certain part of a splotch.
What is an example for a wave interaction?
Reflection and absorption...most likely a combination of the two. In reflection the wave bounces back off the barrier and, depending on the incident wave and how it matches in phase with the reflected wave, the reflected wave could be enhanced through constructive interference with the incident wave or degraded through destructive interference. In absorption, the energy from the incident wave is taken into the barrier material. This typically causes the barrier to vibrate indicating the energy it absorbed. A barrier is more likely to absorb the energy when its natural frequency is some harmonic of the incident wave.
What causes iridescence?
Iridescence is caused by the cancellation of colors. Iridescence is the phenomenon whereby interference of light waves of mixed frequencies reflected from the top ad bottom of thin films produces a spectrum of colors.
Which properties of light defines light as a wave?
It can be reflected, refracted and polarised. It also shows the phenomenon of interference. (Young's double slit experiment) The above are the properties of waves. Light shows these properties and thus, this defines light as a wave.
Why an exssecively thin film appears black in the reflection of light?
Destructive interference. If the sheet is very thin, near half the wavelength of the incident light then light reflected from the top layer is out of phase with light reflected from the bottom layer. These two reflected light waves will cancel each other out.
What would occur when light is reflected from a rough or unpolished surface?
interference
The formation of standing wave requires?
interference between the incoming and reflected waves of the same frequency
How does a Michelson interferometer convert phase modulation into amplitude modulation?
initially the two beams i.e. one reflected and one transmitted from semi reflecting glass were in different phase but when they superimpose two interference take place - constructive and destructive. since in both the interferences amplitude changes.
Explain the principles behind the reason why you see colors on soap bubbles?
This works through interference patterns. The wall of the soap bubble is very thin - on the order of the wavelength of the light. This makes the interference patterns noticeable. The interference is caused between the light that is reflected from the front part of the bubble wall, and from the light reflected from the back part of the bubble wall.
What causes the spectrum of colors seen in gasoline splotches on a wet street?
That is caused by constructive and destructive interference, between the light that gets reflected from the upper and the lower side. Normal daylight is a mix of many different colors, which have different wavelengths; therefore, the different colors will be affected differently in a certain part of a splotch.
In newton's ring how does interference occur?
Newton's rings are formed due to interference between the light waves reflected from the top and bottom surfaces of the air film formed between the lens and glass sheet.
What causes the colorful swirls in soap bubbles?
When an incoming ray of light strikes the outer surface of a bubble, part of the light ray is reflected immediately, while the other part is transmitted into the soap film. After reaching the inner surface of the film, this transmitted light ray is reflected back toward the outer surface. When it leaves the bubble, it travels in the same direction as the ray that was immediately reflected and is, therefore, parallel to that ray. If these two rays of light are reflected back so that their wavelengths are "out of phase" with each other, the second ray will partly cancel out the reflection of the first ray. This is called destructive interference, which results in a reduction of color intensity. If, however, the wavelengths of the two reflected rays are "in phase," they will enhance each other. This is called constructive interference. The light rays that are reflected off the inner surface of the bubble travel further than the light rays that are reflected off the outer surface. Some wavelengths will interfere destructively and others constructively, depending on the extra distance traveled by a transmitted-and-reflected ray. Whether the reflected rays are in or out of phase with each other depends on the extra distance (through the film and back) that the second ray must travel before rejoining the first ray. This distance depends on the angle of the incident light and the thickness of the film.White light is made up of different colors, corresponding to specific wavelengths. As the film thickness changes, the extra distance the ray must travel changes. Interference is constructive when the total extra distance matches a specific wavelength of light, and is destructive when it is half a wavelength. So if white light shines on a bubble, the film reflects light of a specific hue, and this hue changes with the film's thickness.The iridescence of a soap bubble, which seems to contain a wealth of changing color, stems from light striking the bubble from varied angles. The path length varies with the angle of incident light, giving varying path differences for the internally and externally reflected rays at different points on the bubble. This means that, even if the soap film is of uniform thickness, different colors can be seen. Light entering the bubble directly travels a shorter path than light entering at a wider angle. This allows different wavelengths to undergo constructive and destructive interference, so different colors are perceived.
Why are the fringes called non localized?
When the reflected ray of resulting interference is parallel by which fringes formed at infinity then this type of fringes is known as non localised fringes
Which Enlightenment principle is most clearly reflected in this excerpt from the Declaration of Independence That whenever any Form of Government becomes destructive of these ends it is the Right of t?
The social contract
How far the demand for Bioprocess Engineers in Malaysia?
The demand for Bioprocess Engineers in Malaysia is enormous. To realize Vision 2020, the government is currently actively pursuing the establishment of biotechnological-based industries in Malaysia. Malaysian government commitment in promoting biotechnology is reflected in the creation of Bio-Valley, which will provide abundant jobs for Bioprocess Engineers. Moreover, graduates can also work in chemical industries as process engineers.
Does an LCD TV need a dedicated electrical outlet?
A dedicated circuit assures that you do not have any external interference on the TV. The quality of today's TV's are very sensitive to fluctuations in the signal. Any interference will be reflected in the picture quality. If the circuit is not dedicated, a regular circuit will be shared sometime in the future to a wall plug outlet that a device will be plugged in. You have no idea what "noise" will be generated and reflected on the TV. Why take that chance. Fluorescent lights are incredibly noisy and will show on the TV.
