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WorksheetsSuperpostion of Waves
Total questions: 10
Worksheet time: 41mins
T is a microwave transmitter placed at a fixed distance from a flat reflecting surface S. A small microwave receiver is moved steadily from T towards S and receives signals of alternate maxima and minima of intensity.
The distance between successive maxima is 15 mm.
What is the frequency of the microwaves?
1.0 x 107 Hz
2.0 x 107 Hz
1.0 x 1010 Hz
2.0 x 1010 Hz
1.0 x 1011 Hz
A teacher sets up the apparatus shown to demonstrate a two-slit interference pattern on the
screen. Which change to the apparatus will increase the fringe spacing?
decreasing the distance p
decreasing the distance q
decreasing the distance r
decreasing the wavelength
increasing the size of the slit
A double-slit interference experiment is set up as shown. Fringes are formed on the screen. The distance between successive bright fringes is found to be 4 mm.
Two changes are then made to the experimental arrangement. The double slit is replaced by another double slit which has half the spacing. The screen is moved so that its distance from the double slit is twice as great.
What is now the distance between successive bright fringes?
1.0 mm
2.0 mm
4.0 mm
8.0 mm
16 mm
Where, in a standing wave, do the vibrations of the medium occur?
only at the nodes
only at the antinodes
at all points on the medium
at all points between the nodes
at all points between the antinodes
Light of wavelength 700 nm is incident on a pair of slits, forming fringes 3.0 mm apart on a screen.
What is the fringe spacing when light of the same wavelength is used and the slit separation is doubled?
0.75 mm
1.5 mm
3.0 mm
4.5 mm
6.0 mm
The diagram represents the pattern of stationary waves formed by the superposition of sound waves from a loudspeaker and their reflection from a metal sheet (not shown).
W, X, Y and Z are four points on the line through the centre of these waves.
Which statement about these stationary waves is correct?
An antinode is formed at the surface of the metal sheet.
A node is a quarter of a wavelength from an adjacent antinode.
The oscillations at X are in phase with those at Y.
The stationary waves oscillate at right angles to the line WZ.
A node oscillate parallel to the line WZ
A buzzer emitting sound of frequency 846 Hz is attached to a string and rotated in a horizontal circle. The linear speed of the buzzer is 25.0 m s-1. The speed of sound is 340 m s-1. What will be the minimum frequency observed by the observer?
783
788
864
908
913
P and Q are fixed points at the end of a string. A transverse stationary wave of constant
maximum amplitude is formed on the string.
P, R and Q are the only points on the string where nodes are formed. S and T are two points on
the string at a distance x from R.
What is the relationship between points S and T?
the same amplitude and in phase
different amplitudes and in phase
the same amplitude and a phase difference of 180º
the different amplitudes and a phase difference of 180º
the same amplitude and out of phase
Monochromatic light is incident on a pair of narrow slits a distance of 0.1mm apart. A series of bright and dark fringes are observed on a screen a distance of 2.0 m away. The distance between adjacent bright fringes is 8.0 mm. What is the path difference between the light waves from the two slits that meet at the second order dark fringe?
1.0 x 10-7 m
2.0 x 10-7 m
4.0 x 10-7 m
6.0 x 10-7 m
8.0 x 10-7 m
A musical instrument called a bugle is a long tube with a mouthpiece at one end. The other end is
open and flared, as shown.
A musician maintains stationary sound waves with a node at the mouthpiece and an antinode at
the other end. The lowest frequency of sound that the bugle can produce is 92 Hz.
Which different frequencies of sound can be produced by the bugle?
92 Hz, 138 Hz, 184 Hz, 230 Hz, 276 Hz
92 Hz, 184 Hz, 276 Hz, 368 Hz, 460 Hz
92 Hz, 184 Hz, 368 Hz, 736 Hz, 1472 Hz
92 Hz, 276 Hz, 460 Hz, 644 Hz, 828 Hz
92 Hz, 276 Hz, 828 Hz, 2484 Hz, 7452 Hz
