#4 | Principle of Superposition: II
(Physics) > Wave Optics
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Related Practice Questions :

Two coherent sources of light can be obtained by

(1) Two different lamps

(2) Two different lamps but of the same power

(3) Two different lamps of the same power and having the same colour

(4) None of the above

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By Huygen's wave theory of light, we cannot explain the phenomenon of 

(1) Interference

(2) Diffraction

(3) Photoelectric effect

(4) Polarisation

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When a ray of light falls on a given plate at an angle of incidence 60°, the reflected and refracted rays are found to be normal to each other. The refractive index of the material of the plate is

1.  32

2.  1.5

3.  1.732

4.  2

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Huygens' wave theory allows us to know the 

1.  Wavelength of the wave

2.  Velocity of the wave

3.  Amplitude of the wave

4.  Propagation of wavefronts

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Huygen's principle for secondary wavelets may be used to

1.  Explain Snell's law

2.  Find the velocity of light in vacuum

3.  Find a new position of a wavefront

4.  Both (1) & (3) are correct

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