STATIONARY WAVES

“Physics Tutorial: Formation of Standing Waves.” The Physics Classroom, www.physicsclassroom.com/class/waves/Lesson-4/Formation-of-Standing-Waves.

“Standing Waves Review (Article).” Khan Academy, Khan Academy, www.khanacademy.org/science/ap-physics-1/ap-mechanical-waves-and-sound/standing-waves-ap/a/standing-waves-review-ap.

Zanichelli, Nicola. VINCITORE Fisica 2014 - Onde Stazionarie "Fai Da Te". 14 Apr. 2014, [www.youtube.com/watch?v=a6fK0pLqbJg.]

Standing Waves formation

Standing Waves

Elert, Glenn. “Standing Waves.” The Physics Hypertextbook, [physics.info/waves-standing/.]

Standing waves

EXPERIMENT PROCEDURE

  1. Place the power generator and the support holder at a distance of 45cm
  1. Attach a one end of the rubber cord to the generator and the other to the holder

the author is a physics teacher who wrote the article the ...

KEY CONCEPTS

  1. Connect the oscillator to the laptop and to the generator
  1. Turn on the generator (make sure it’s plugged to the current)
  1. Set the amplitude at 700mV, the attenuation at 1 and the frequency range of 10-110Hz.
  1. Raise the frequency of the generator until you see the nodes

STANDING WAVES

Waves which appear to be vibrating vertically without traveling horizontally. Created from waves with identical frequency and amplitude interfering with one another while traveling in opposite directions.

  1. Observe the graph on the computer from the oscillator

NODE

Positions on a standing wave where the wave stays in a fixed position over time because of destructive interference.

  1. Since every unit fragment of the x-axis equals to 4, multiply 4 by the number of fragments in one wave

ANTINODE

  1. Divide 1 by this number and then divide the result by 1000

Positions on a standing wave where the wave vibrates with maximum amplitude.

  1. Repeat the experiment witth the other number of nodes

FUNDAMENTAL FREQUENCY

Lowest frequency of a standing wave that has the fewest number of nodes and antinodes.

KEY CONCEPTS

nodes are found where the amplitude is zero (or very low)

waves (also called antinodes) created when the amplitude is very high or maximum

standing waves are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude

don't propagate

FORMATION

IMPORTANCE OF TIMING

always form at fixed ends

always form at free ends

link to www.khanacademy.org