Wave Interference
Physics ⇒ Waves and Sound
Wave Interference starts at 9 and continues till grade 12.
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See sample questions for grade 12
A student notices that when two tuning forks of slightly different frequencies are sounded together, a periodic variation in loudness is heard. What is this phenomenon called?
A student observes alternating loud and soft sounds as two speakers emit the same frequency in phase. What phenomenon is being observed?
Describe the difference between constructive and destructive interference.
Describe what is meant by the term 'fringe' in the context of wave interference.
Explain why the interference pattern disappears if the two sources are not coherent.
A student notices that when two tuning forks of slightly different frequencies are sounded together, a periodic variation in loudness is heard. What is this phenomenon called?
A student observes alternating loud and soft sounds as two speakers emit the same frequency in phase. What phenomenon is being observed?
If two sound waves of frequencies 256 Hz and 260 Hz are played together, what is the beat frequency?
In a double-slit experiment, the slit separation is 0.5 mm and the screen is 2 m away. If the wavelength of light used is 600 nm, calculate the distance between adjacent bright fringes.
Which of the following best describes coherent sources? (1) Sources that emit waves of the same frequency and constant phase difference. (2) Sources that emit waves of different frequencies. (3) Sources that emit waves of random phase. (4) Sources that emit waves of different amplitudes.
Which of the following equations gives the condition for constructive interference in a double-slit experiment? (1) d sinθ = nλ (2) d sinθ = (n+1/2)λ (3) d sinθ = 2nλ (4) d sinθ = nλ/2
Which of the following equations gives the condition for destructive interference in a double-slit experiment? (1) d sinθ = nλ (2) d sinθ = (n+1/2)λ (3) d sinθ = 2nλ (4) d sinθ = nλ/2
Which of the following is a necessary condition for observing a clear interference pattern? (1) The sources must be monochromatic. (2) The sources must be coherent. (3) The sources must be polarized. (4) The sources must be of high intensity.
In a double-slit experiment, the distance between adjacent bright fringes is called the ______.
The beat frequency heard when two sound waves of frequencies f1 and f2 interfere is given by ______.
The superposition principle states that when two or more waves overlap, the resultant displacement at any point is the ______ of the displacements of the individual waves.
When two waves meet and the resulting amplitude is greater than the amplitude of either wave alone, this is called ______ interference.
True or False: Interference can only occur with sound waves, not with light or water waves.
True or False: The interference pattern produced by two point sources of sound is a result of the path difference between the waves reaching a point.
True or False: The principle of superposition applies only to linear waves.
