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Class 12 Physics
Wave Optics Chapter 10
Quiz 1
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For sustained interference we need two sources which emit waves:
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with same amplitude
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with same intensity
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in a narrow beam
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having constant phase difference
When the interference occurs with coherent sources, _______ of the superimposing waves add like _______.
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intensities, scalars
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amplitudes, vectors
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amplitudes, scalars
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intensities, vectors
Two sources of light are said to be coherent when both give out light waves of same:
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phase and speed
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wave length and constant phase difference
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intensity and wavelength
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amplitude and phase
Phase difference between two coherent sources should be:
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zero
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πn rad
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π rad
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π/2 rad
Coherent sources can be created by the division of:
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only amplitude
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only wave front
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only wavelength
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both amplitude and wave front
In a Fresnel's biprism experiment, the two coherent sources are obtained by:
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two slits
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reflection
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Refraction
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Internal reflection
A 60.0 kHz transmitter sends an EM wave to a receiver 21 km away. The signal also travels to the receiver by another path where it reflects from a helicopter. Assume that there is a 180o phase shift when the wave is reflected. This situation will give ________.
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constructive interference
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destructive inference
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something in between constructive and destructive interference
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None of the above
Light of wavelength λ in vacuum enters a medium of refractive index μ. Two points in this medium, lying along the path of this light, are at a distance x apart. The phase difference between these points is
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A
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B
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C
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D
Which of the following is not essential for two sources of light in Young's double slit experiment to produce a sustained interference?
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equal frequency
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Constant phase difference
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equal intensity
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equal wavelength
Which of the following is not an example of coherent source produced by the division of wavefront?
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Fresnel's biprism
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Lloyd's mirror
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Young's double slit experiment
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Interference by thin films
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