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प्रश्न
What should be the slit width to obtain pronounced diffraction with a single slit illuminated by the light of wavelength λ?
उत्तर
To obtain pronounced diffraction with a single slit, the slit width should be of the order of wavelength λ.
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संबंधित प्रश्न
What is the diffraction of light? How does it differ from interference? What are Fraunhofer and Fresnel diffractions?
Derive the conditions for bright and dark fringes produced due to diffraction by a single slit.
In a biprism experiment, the fringes are observed in the focal plane of the eyepiece at a distance of 1.2 m from the slits. The distance between the central bright and the 20th bright band is 0.4 cm. When a convex lens is placed between the biprism and the eyepiece, 90 cm from the eyepiece, the distance between the two virtual magnified images is found to be 0.9 cm. Determine the wavelength of light used.
A star is emitting light at the wavelength of 5000 Å. Determine the limit of resolution of a telescope having an objective of a diameter of 200 inch.
The bending of a beam of light around corners of obstacle is called ______
In a single slit diffraction pattern, the first minima obtained with the red light of wavelength 6600 A.U. coincides with the first maxima f some other wavelength λ then is ______
A lens having focal length f gives Fraunhofer type diffraction pattern of a slit having width a. If wavelength of light is λ, the distance of first dark band and next bright band from axis is given by ____________.
The condition for observing Fraunhofer diffraction pattern from an obstacle is that the light wavefront incident on it must be ______.
In Fresnel's biprism experiment, when the distance between the slit aperture and eye is increased, then distance between the fringes ____________.
The first minimum of a single slit diffraction pattern is observed at angle 2° with a light of wavelength 510 nm. The width of this slit is ____________.
When two coherent sources in Young's experiment are far apart, then interference pattern ______
In Young's double slit experiment, the fringe width is 12 mm. If the entire arrangement is placed in water of refractive index `4/3`, then the fringe width becomes (in mm) ______.
A physical quantity P is described by the relation p = a1/2 b2 c3 d-4. If the relative errors in the measurement of a, b, c and d respectively, are 2%, 1%, 3% and 5%, then the relative error in P will be ______.
In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2 m away from the lens. If wavelength of light used is 5000 Å, then the distance between the first minimum on either side of the central maximum is ______. (θ is small and measured in radian)
Let a steel bar of length l, breadth b and depth d be loaded at the centre by a load W. Then the sag of bending of beam is ______.
(Y = Young's modulus of material of steel)
In Fraunhoffer diffraction experiment, L is the distance between the screen and the obstacle, b is the size of the obstacle and λ is the wavelength of the incident light. The general condition for the applicability of Fraunhoffer diffraction is ______.
In a Young’s experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1mm from the central fringe, then the wavelength of monochromatic light used will be ______.
The angular separation of the central maximum in the Fraunhofer diffraction pattern is measured. The slit is illuminated by the light of wavelength 6000 Å. If the slit is illuminated by light of another wavelength, the angular separation decreases by 30%. The wavelength of light used is ______.
In a Young's double slit experiment carried out with light of wavelength λ = 5000 Å, the distance between the slits is 0.2 mm and the screen is at 200 cm from the slits. The central maximum is at x = 0. The third maximum (taking the central maximum as zeroth maximum) will be at x equal to ______.
The angular width of the central maximum of the diffraction pattern in a single slit (of width a) experiment, with λ as the wavelength of light, is ______.
In Young's double slit experiment, which of the following graph represents the correct variation of fringe width β versus distance D between sources and screen?
The first diffraction minimum due to single slit diffraction is θ, for a light wavelength 5000 Å. If the width of slit is 1 × 10-4 cm, then the value of θ is ______.
In a biprism experiment, the slit is illuminated by red light of wavelength 6400 A and the crosswire of eyepiece is adjusted to the centre of 3rd bright band. By using blue light it is found that 4th bright band is at the centre of the cross wire. Calculate the wavelength of blue light.
Using the geometry of the double slit experiment, derive the expression for fringe width of interference bands.
