What do you mean by coherent sources?

Two sources of waves are called coherent if the phase difference between them is constant, i.e. independent of time and waves have the same frequency. Waves coming from two independent sources can not be coherent. Two real or virtual sources produced by the single source are coherent. When the waves are coherent, then only interference occurs.

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Gamma Question Bank for Medical Physics>Chapter 27 - Wave Optics>Assigment>Q 11

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In YDSE, a thin film $(μ = 1.6)$ of thickness $0.01 mm$ is introduced in the path of one of the two interfering beams. The central fringe moves to a position occupied by the $1 0^{th}$ bright fringe earlier. The wave length of wave is

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Important Questions on Wave Optics

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Gamma Question Bank for Medical Physics>Chapter 27 - Wave Optics>Assigment>Q 12

In Young's double slit experiment the intensity at a point where the path difference is

\frac{λ}{6}

is

I

. If

I_{0}

, denotes the maximum intensity,

\frac{I}{I_{0}}

is :

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Gamma Question Bank for Medical Physics>Chapter 27 - Wave Optics>Assigment>Q 13

The maximum intensity of fringes in Young's experiment is I. If one of the slits is closed, then intensity at that place becomes

I_{0} .

Then relation between

I

and

I_{0}

is

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Gamma Question Bank for Medical Physics>Chapter 27 - Wave Optics>Assigment>Q 14

In Young's double-slit interference experiment, the slit separation is made $3$ fold. The fringe width becomes

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Gamma Question Bank for Medical Physics>Chapter 27 - Wave Optics>Assigment>Q 15

In Young's experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width

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Gamma Question Bank for Medical Physics>Chapter 27 - Wave Optics>Assigment>Q 16

In Young's experiment, the separation between