What is the goal of the standing waves lab?
Goal: To measure the velocity of waves on a string and measure the velocity of sound. To prepare for this lab you should read through the following material and you should also read through the equipment section.
How do you describe a standing wave?
standing wave, also called stationary wave, combination of two waves moving in opposite directions, each having the same amplitude and frequency. The phenomenon is the result of interference; that is, when waves are superimposed, their energies are either added together or canceled out.
What is standing waves on a string?
Standing Waves on a String A standing wave pattern is a pattern which results from the interference of two or more waves along the same medium. All standing wave patterns are characterized by positions along the medium which are standing still. Such positions are referred to as nodal positions or nodes.
How does string length affect standing wave?
Pressing the finger at different places changes the length of string, which changes the wavelength of standing wave, affecting the frequency. (Smaller lengths of string result in shorter wavelength and thus higher frequency.)
How can you create a standing wave on a string?
Standing waves are produced on a string when equal waves travel in opposite directions. When the proper conditions are met, the interference between the traveling waves causes the string to move up and down in segments, as illustrated below.
How do you find the tension in a string wave?
Solution
- Use the velocity equation to find the speed: v=√FTμ=√56.40N3.09×10−4kg/m=427.23m/s.
- The tension would need to be increased by a factor of approximately 20.
- Use the velocity equation to find the actual tension: FT=μv2=(5.78×10−3kg/m)(427.23m/s)2=1055.00N.
- This solution is within 7% of the approximation.
What is a real life example of a standing wave?
A famous example of standing waves in the real world are the strings on a guitar, or any string instrument. In these instruments, a plucked string emits a particular frequency depending on how taut and dense the string is and the string length.
What is the wavelength of the standing wave?
Figure 2: For the fundamental frequency of a standing wave between two fixed ends, the wavelength is double the length of the string. Each successive harmonic has an additional node and antinode.
When a standing wave occurs on a string quizlet?
When a standing wave occurs on a string, Many points along the string move up and down; some move more than others, and some are stationary.
How do standing waves produce sound?
In musical instruments, a standing wave can be generated by driving the oscillating medium (such as the reeds of a woodwind) at one end; the standing waves are then created not by two separate component waves but by the original wave and its reflections off the ends of the vibrating system.
How do you find the wavelength of a standing wave?
Their wavelength is given by λ = v/f. Since the frequency is fixed, the wavelength of the waves can only be changed by changing the speed of the waves.