Answer these questions before coming to the lab and turn in your answers at the

Question

Answer these questions before coming to the lab and turn in your answers at the beginning of the lab to get credit. Turning this pre lab question sheet later would result in not getting any credit for the pre lab. 1. What is a standing wave? 2. What is the name given to a point on a vibrating string at which displacement is always zero? 3. The length of the string from the vibrator to the point where the string touches the top of the pulley is 1.20m. What is the wavelength of the standing wave corresponding to three loops? Read the handout to find the relation between number of loops, string length and wavelength. Show your work to get credit. 4, what is the longest possible wavelength for a standing wave in terms of the string length L? Show your work to get credit. 5. What mass would I need to get one loop only? Show your work.

Explanation / Answer

1.standing wave, also called stationary wave, combination of two waves moving in opposite directions, each having the same amplitude and frequency.

2.zerodisplacement point is known as node

3.here 3 loops part is equal to given length each loop equla to wavelength/2

3xwavelegth/2=1.2 m

wavelength =0.8 m

4.if wave with one loop is formed then wave length will be long

5.

4

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