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Wave Optics Test - 52
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Wave Optics Test - 52
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  • Question 1/10
    4 / -1
    In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the sits. If the screen is moved by 5 × 10–2 m towards the slits, the change in fringe width is 3 × 10–5 m. If separation between the slits is 10–3 m, the wavelength of light used is
    Solutions

  • Question 2/10
    4 / -1
    In the figure is shown Young\'s double slit experiment. Q is the position of the first bright fringe on the right side of O. P is the 11th fringe on the other side, as measured from Q. If the wavelength of the light used is 600 × 10–10 m, then S1B will be equal to

    Solutions

  • Question 3/10
    4 / -1
    Four light waves are represented by
    (i) y = a1 sin ω t
    (ii) y = a2 sin (ω t + ϕ)
    (iii)y = a1 sin 2ω t
    (iv) y = a2 sin2 (ω t + ϕ)
    Interference fringes may be observed due to superposition of
  • Question 4/10
    4 / -1
    In Young\'s double slit experiment the y-co-ordinates of central maxima and 10th maxima are 2 cm and 5 cm respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5 the corresponding y-co-ordinates will be
    Solutions

  • Question 5/10
    4 / -1
    The maximum intensity in Young\'s double slit experiment is I0. Distance between the slits is d = 5λ, where λ is the wavelength of monochromatic light used in the experiment. What will be the intensity of light in front of one of the slit on a screen at a distance D =10 d
    Solutions

  • Question 6/10
    4 / -1
    A monochromatic beam of light falls on YDSE apparatus at some angle (say θ) as shown in figure. A thin sheet of glass in inserted in front of the lower slit S2. The central bright fringe (path difference = 0) will be obtained

    Solutions

  • Question 7/10
    4 / -1
    In Young\'s double slit experiment how many maximas can be obtained on a screen (including the central maximum) on both sides of the central fringe if λ = 2000 Å and d= 7000 Å
    Solutions

  • Question 8/10
    4 / -1
    In a Young\'s double slit experiment, the slits are 2 mm apart and are illuminated with a mixture of two wavelengths λ0 = 750 nm and λ = 900 nm. The minimum distance from the common central bright fringe on a screen 2 m from the slits where a bright fringe from one interference pattern coincides with a bright fringe from the other is
    Solutions

  • Question 9/10
    4 / -1
    A flake of glass (refractive index 1.5) is placed over one of the openings of a double slit apparatus. The interference pattern displaces itself through seven successive maxima towards the side where the flake is placed. If wavelength of the diffracted light is λ = 600 nm, then the thickness of the flake is
    Solutions

  • Question 10/10
    4 / -1
    Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of wavelength λ passing through an ideal source slit S placed on the line through S2 as shown. The distance between the planes of slits and the source slit is D. A screen is held at a distance D from the plane of the slits. The minimum value of d for which darkness at O is

    Solutions

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