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?
Calculate the path difference required for constructive interference between two waves of wavelength 600 nm.
Calculate the path difference required for destructive interference between two waves of wavelength 500 nm.
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.
Explain why two light sources are generally not coherent.
If the path difference between two waves is 1.5λ, what type of interference occurs at that point?
If the path difference between two waves is 2λ, what type of interference occurs at that point?
If the phase difference between two interfering waves is π radians, what type of interference occurs?
If the phase difference between two interfering waves is 0, what type of interference occurs?
If two sound waves of frequencies 256 Hz and 260 Hz are played together, what is the beat frequency?
If two waves of amplitude 3 units and 4 units interfere destructively and are 180° out of phase, what is the amplitude of the resultant wave?
If two waves of equal amplitude and frequency are in phase, what will be the amplitude of the resultant wave?
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.
In a sound interference experiment, two speakers are placed 3 m apart and emit a 340 Hz tone in phase. If the speed of sound is 340 m/s, what is the wavelength of the sound?
What is wave interference?
A soap film (n = 1.33) is illuminated by monochromatic light of wavelength 480 nm in air. What is the least thickness of the film that will result in a dark appearance due to destructive interference when viewed in reflected light?
A sound wave of frequency 400 Hz interferes with another sound wave of the same frequency and amplitude, but with a phase difference of 90°. What is the amplitude of the resultant wave in terms of the original amplitude A?
