Waves & Oscillation
Two periodic waves of intensities I1 and I2 pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is
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If the intensities of two interfering waves be I1 and I2 , the contrast between maximum and minimum intensity is maximum, when
Two waves of amplitudes A and 3A are superposed and they have a phase difference of 2π. What kind of interference is possible
Two sounds of equal amplitudes and frequencies, n1 and n2 reach a point together. the resultant wave can have which of the following forms ( symbols have their usual meaning)?
A slit of width is illuminated by white light. For red light (λ=6500A˚), the first minima is obtained at θ=30∘. Then the value of will be
Two waves of amplitudes A and 3A are superposed and they have a phase difference of π. What kind of interference is possible
Light of wavelength 5000 A˙ falls on a plane reflecting surface. What are the wavelength and frequency of the reflected light? For what angle of incidence is the reflected ray normal to the incident ray?
When interference of light takes place
Sound waves from a tuning fork A reach a point P by two separate paths ABP and ACP. When ACP is greater than ABP by 11.5 cm, there is silence at P. When the difference is 23 cm the sound becomes loudest at P and when 34.5 cm there is silence again and so on. Calculate the minimum frequency (in Hz) of the fork if the velocity of sound is taken to be 331.2 m/s.