STANDING WAVE

Standing waves are created by

• Two identical waves reflecting off each other

• Two identical waves being diffracted together

• Two identical waves move through each other in opposite directions

• Two identical waves are diffracted from two identical sources

In the diagram which letters represent the nodes

• A B C

• A C E

• B D

• B D E

• A C D

The moving black dot is called:

• a node
• an anti-node
• an anti-amplitude
• the wangy bit

The stationary dot is called:

• a node.
• an anti-node.
• the amplitude.
• the not moving bit.

When two waves combine to form a new wave with a smaller amplitude, it is called 

• Refraction
• Constructive Interference
• Resonance
• Destructive Interference

A standing wave:

• transports energy but does not move.
• is composed of a single travelling wave.
• stores energy.
• makes a loud noise.

Which of the following is correct for a stationary wave?

• Between two nodes the amplitude of the wave is constant.

• The two waves producing the stationary wave must always be 180° out of phase.

• The separation of the nodes for the second harmonic is double the separation of nodes for the first harmonic

• Between two nodes all parts of the wave vibrate in phase.

In vibrating cord the points where the amplitude is maximum, are called:

• Antinodes

• Nodes

• Troughs

• Crests

A standing wave is formed on a string.  Which of the following statements is/are true?
∎  Progressive waves are travelling along the string in both directions.
∎  The standing wave is an example of superposition.
∎  The wavelength of the standing wave is d.

• 1, 2 and 3
• Only 1 and 2
• Only 2 and 3
• Only 1

On a standing-wave pattern, the distance between two consecutive nodes is d. The wavelength is

• d/2

• d

• 3/2d

• 2d

• 4d