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Intensity Amplitude Relationship

101.S1 and S2...

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101.S1 and S2 are the 2 coherent point sources of light located in the xy plane at pooits (0,0) and (0,3 lambda) respectively here lambda is wavelength of light. at which point intensity of interference is maximum. 1)3lambda,0 2)4 lambda,o 3)5lambda/4,0 4)2lambda/3,0

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S_{1}

S_{2}

are the two coherent point sources of light located in the xy-plane at points (0,0) and (0,3

λ

) respectively. Here

λ

is the wavelength of light. At which one of the following points (given as coordinates), the intensity of interference will be maximum?

Q. (a) Why are coherent sources necessary to produce a sustained interference pattern?
(b) In young's double slit experiment using monochromatic light of wavelength

λ

, the intensity of light at a point on the screen where path difference is

λ

, is K units
Find out the intensity of light at a point where path difference is

λ / 3

Q. Three identical monochromatic point sources of light emit light of wavelength

λ

coherently and in phase with each other. They are placed on the x-axis at the points x = -d, 0 and d, find the minimum value of

d / λ

for which there is destructive interference with almost zero resultant intensity at points on the x-axis having x>>d.

Q. The intensity of central maximum in the interference pattern obtained by two coherent sources of wavelength

λ

and amplitude a is I. In other experiment, the intensity of central maximum in the interference pattern obtained by two non – coherent sources of wavelength

λ

and amplitude a is I' The value of I' will be

Q. An interference is observed due to two coherent sources

S_{1}

placed at origin and

S_{2}

(0, 3 λ, 0)

λ

is the wavelength of the sources. A detector D is moved along the positive

x -

x -

coordinates on the

x -

(excluding x = 0 and x = \infty)

where maximum intensity is observed.

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