The intensity at the maximum in a Young’s double slit experiment is I₀. Distance between two slits is d=5λ, where λ is the wavelength of light used in the experiment. What will be the intensity […]
Which of the following phenomena support the wave theory of light? 1. Scattering 2. Interference 3. Diffraction 4. Velocity of light in a denser medium is less than the velocity of light in the rare […]
Two coherent monochromatic beams of intensities I and 4I respectively, are superposed. Then, the maximum and minimum intensities in the resulting pattern are
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(a) 5I and 3I (b) 9I and 3I (c) […]
A fringe width of a certain interference pattern is β=0.002 cm. What is the distance of 5th dark fringe centre?
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(a) 1×10⁻² cm (b) 11×10⁻² cm (c) 1.1×10⁻² cm (d) 3.28×10⁶ cm
A beam of light of wavelength 590 nm is focussed by a converging lens of diameter 10 cm at a distance of 20 cm form it. Find the diameter of the disc image formed
If two slits in Young’s experiment are 0.4 mm apart and fringe width on a screen 200 cm away is 2 mm, the wavelength of light illuminating the slits is
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(a) 500 […]
In Young’s double slit experiment, when wavelength used is 6000Å and the screen is 40 cm from the slits, the fringes are 0.012 cm wide. What is the distance between the slits?
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The parallel beams of monochromatic light of wavelength 4.5 x10⁻⁷ m passes through a long slit with width 0.2×10⁻³ m. The angular divergence in which most of the light is
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(a) 4.5×10⁻³rad […]
A beam of light contains two wavelengths 6500Å and 5200Å. They form interference fringes in Young’s double slit experiment. What is the least distance (approx) from central maximum, where the bright fringes due to both […]
In Young’s double slit experiment, the phase difference between the two waves reaching at the location of the third dark fringe is
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(a) π (b) 3π/2 (c) 5π (d) 3π
Correct Answer:
3π/2
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