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Will there be an interference pattern on...

Will there be an interference pattern on the screen if the slits in Young's experiment are illuminated by two different sodium lamps emitting light of same frequency and wavelength?

Text Solution

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No, because the phase difference between two lamps will be changing continuously.
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Mark the statement true or false : (a) In Young's double slit expt, performed with a source of white light, only black and white fringes are observed. (b) Two slits in Young's double slit expt are illuminated by by two different sodium lamps emitting light of same wavelength. No interference pattern will be obtained.

The two slits in Young's double slit experiment are illuminated by two different sodium lamps emitting light of the same wavelength. No interference pattern will be observed on the screen.

Knowledge Check

  • What happens to the interference pattern if the two slits in Young's experiment are illuminated by two independent sources such as two sodium lamps S and S' as shown in figure

    A
    Two sets of inteference fringes overlaps.
    B
    No fringes are observed.
    C
    The intensity of the bright fringes is doubled.
    D
    The intensity of the bright fringe become four times.

  • STATEMENT-1 The two silts in YDSE are illuminated by two different sodium lamps emitting light of same wavelength .No interference pattern will be observed. STATEMENT-2 Two independent light sources (except LASER )cannot be coherent.

    A
    Statement-1 is true Statemetnt-2 is True,Statement -2 is a correct explanation for statement -1.
    B
    Statement-1 is true Statemetnt-2 is True,Statement -2 is NOT a correct explanation for statement -1.
    C
    Statement -1 is true,statement -2 is false
    D
    Statement -1 is False ,statement -2 is True.

  • In a Young's double slit experiment, the fringe pattern is observed on a screen placed at a distance from The slis. The clits are separated by a distance d, and are illuminated by monochromatic light of wavelength lamda. The length of the slits is l,l is usually much greater than d. The slit w is extremely small, and the slits are otherwise identical.

    A
    The intensity falls to `(1)/(3)` its maximum value at a distance of `(lamda D)/(6d)` from the central point
    B
    If the width of one of the slite is doubled (compared to the other), the intensity of the maxima decreases, and that of the minima also increases.
    C
    If the length of the slits is dereased so that it is almost equal to w, the intensity of the maxima remains unchanged.
    D
    If the length of the slits is decreased so that it is almost equal to w, the fringes become curved.

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    What type of interference pattern will be observed if two light sources of same wavelengths are used in Young's double-slit experiment ?

    In YDSE, two slits are illuminated by two light sources of same wavelength. Will you observe interference pattern ?

    In Young's experiment, interference pattern is obtained on a screen at a distance of 1 m from slits separated by 0.05 cm and illuminated by sodium light of wavelength 5893 Å . Calculate distance between 4th bright fringe on one side and 3rd bright fringe on other side of central bright fringe.

    Statement-I : In Young's double slit experiment interference pattern dissapears when one of the slits is closed Statement-II : Interference is observed due to superposition of light waves from two coherent source

    If two slightly, different wavelengths are present in the light used in Young's double-slit experiment, then

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