The speed of sound depends on the medium employed. For example, in air, it is meters per second. Sound travels the fastest in solids. The velocity of sound is higher in liquids than in air. The sound velocity is affected by atmospheric conditions such as temperature, altitudes, air pressure, and density.
The variation in pressure in the sound waves repeats after a particular time or after traveling a certain distance. This distance is termed as the wavelength of the sound wave. Within a given time period, a certain number of wavelengths cross a point in space. The number of wavelengths passing the point per second is known as the frequency of the sound wave. The SI unit of frequency is hertz or kilohertz and is denoted by f.
The measure of heights of the sound waves that define the loudness of a sound by determining the maximum amount of displacement occurring in oscillating particles is called amplitude. It is represented by decibels or dBA. Polarization is an important concept while studying transverse waves- optics, seismology, radio, and microwaves.
Some of the applications of polarization are the inventions of lasers, radar, and wireless or optical fiber telecommunications. November 9, November 9, November 8, November 7, Your email address will not be published.
Save my name, email, and website in this browser for the next time I comment. Skip to content Polarization is the process through which the wave oscillations are made to move in a single plane. Sound waves as longitudinal waves Sound waves are longitudinal waves consisting of alternative compressions and rarefactions. Why are longitudinal waves unpolarized? How can sound waves be polarized?
How do sound waves travel? Speed of sound waves Sound waves can travel in gas, liquid and solid medium but can not travel in a vacuum as they need molecules that carry the vibration. Why can't sound waves be polarized? Physics Light and Reflection Color and Polarization. Daniel W. Nov 17, Sound waves are longitudinal. Transverse: vibrations perpendicular to the direction of travel of the wave. Longitudinal: vibrations parallel to the direction of travel of the wave.
Sound waves are longitudinal so they cannot be polarised. Polarised: the wave vibrations occur in one plane only Unpolarised: the wave vibrations occur in all planes perpendicular to the direction of travel. Water waves and sound waves are examples of mechanical waves. Light waves are not considered mechanical waves because they don't involve the motion of matter.
Most of the mathematics and properties of mechanical waves apply to light waves. Light waves are different from mechanical waves, however, because they can travel through a vacuum. Light waves are just one type of electromagnetic wave. Other electromagnetic waves include the microwaves in your oven, radio waves, and X-rays.
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