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Byju's Answer
Standard XIII
Physics
YDSE Problems I
If the source...
Question
If the source in YDSE is kept such that it is not equidistant from both slits, the fringe pattern
A
remains the same as the equidistant case.
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B
is different from the equidistant case.
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C
does not get formed, as the sources are incoherent.
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D
none of the above
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Solution
The correct option is
B
is different from the equidistant case.
Think for 30 s, then proceed to the next video for the explanation.
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Similar questions
Q.
What happens when the source is not equidistant from the two slits
Q.
In the set up shown, the two slits
S
1
and
S
2
are not equidistant from the slit S. The central fringe at O is then
Q.
In YDSE, when dichromatic source of light is used we get interference pattern which is obtained by combination of interference pattern due to each wavelength. A black line is obtained on screen where a minima due to each wavelength coincides. Similarly, when polychromatic source is taken say white light source, resulting interference pattern is superimposition of interference pattern from each wavelength as a result at which we get white central bright fringe surrounded by few coloured fringes on both sides of central bright fringe and then uniform illumination of screen. In a typical YDSE set up, distance between slits(D) is 1mm and screen is placed at a distance (D) of 1 m from slits. The source of light used is dichromatic emitting waves of wavelength
λ
1
= 500 nm and
λ
2
= 700 nm.
Fringe width due to
λ
1
is
Q.
Assertion :In YDSE, if a film is introduced in front of the upper slit, then the fringe pattern shifts in the downward direction Reason: In YDSE if the slit widths are unequal, the minima will be completely dark
Q.
In YDSE, a white light is formed fringe pattern on the screen. Calculate the path difference of the light waves from the two slits at the center of the first bright fringe above the central maximum.
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