If L is the coherence length and c the velocity of light, the coherent time is

(1) cL

(2) $\frac{L}{c}$

(3) $\frac{c}{L}$

(4) $\frac{1}{Lc}$

Concept Questions :-

Wave front
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If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities at maxima and minima is

(1) 25 : 16

(2) 5 : 3

(3) 16 : 1

(4) 25 : 9

Concept Questions :-

Superposition principle
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For constructive interference to take place between two monochromatic light waves of wavelength λ, the path difference should be

(1) $\left(2n-1\right)\frac{\lambda }{4}$

(2) $\left(2n-1\right)\frac{\lambda }{2}$

(3) $n\lambda$

(d) $\left(2n+1\right)\frac{\lambda }{2}$

Concept Questions :-

Young Double slit experiment
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Soap bubble appears coloured due to the phenomenon of

(1) Interference

(2) Diffraction

(3) Dispersion

(4) Reflection

Concept Questions :-

Interference vs Diffraction
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Which of the following statements indicates that light waves are transverse

(1) Light waves can travel in vacuum

(2) Light waves show interference

(3) Light waves can be polarized

(4) Light waves can be diffracted

Concept Questions :-

Polarization of light
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Interference was observed in interference chamber when the air was present, now the chamber is evacuated and if the same light is used, a careful observer will see

(1) No interference

(2) Interference with bright bands

(3) Interference with dark bands

(4) Interference in which width of the fringe will be slightly increased

Concept Questions :-

Superposition principle
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Ray diverging from a point source form a wave front that is

(1) Cylindrical

(2) Spherical

(3) Plane

(4) Cubical

Concept Questions :-

Wave front
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Two coherent sources have intensity in the ratio of $\frac{100}{1}$. Ratio of (intensity) max/(intensity) min is

(1) $\frac{1}{100}$

(2) $\frac{1}{10}$

(3) $\frac{10}{1}$

(4) $\frac{3}{2}$

Concept Questions :-

Superposition principle
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If two waves represented by ${y}_{1}=4\mathrm{sin}\omega t$ and ${y}_{2}=3\mathrm{sin}\left(\omega t+\frac{\pi }{3}\right)$ interfere at a point, the amplitude of the resulting wave will be about

(1) 7

(2) 6

(3) 5

(4) 3.5

Concept Questions :-

Superposition principle
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Two coherent sources of intensities, I1 and I2 produce an interference pattern. The maximum intensity in the interference pattern will be

(1) I1 + I2

(2) ${I}_{1}^{2}+{I}_{2}^{2}$

(3) (I1 + I2)2

(4) ${\left(\sqrt{{I}_{1}}+\sqrt{{I}_{2}}\right)}^{2}$

Concept Questions :-

Superposition principle
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Difficulty Level: