BSc Physics SEM IV 2017 18 2017-18 ATKT PHYSICS I Question Paper - Mumbai University | munotes

Questions asked in this paper

• ii) Figures to the right indicate full marks

1. Q1 A) Attempt any one. |8
   • a) Give a brief account of fresnel’s diffraction of a cylindrical wavefront of a straight edge Obtain an expression for the position of maximum and minimum intensity .Comment on
   • b) Discuss the Fraunhofer double slit diffraction phenomenon .Explain the formation of interference bands. Hence show that the angular separation between any two successive maxima or minima is inversly propotional to (a+b),
2. Q1 B) Attempt any one. [7
   • a) Discuss the phenomenon of diffraction at right edge.Explain the intensity distribution at a
   • b) Explain the vector polygon method to show that the resultant intensity at any point on the screen is given by Attempt any one
   • a) A light of wavelength 6000 A illuminates a narrow ractangular slit places at a distance of 0.2 m from a straight edge. Find the separation between the first and second bright band when observed on a screen at a distance of 0.5 m from the edge
   • b) Explain the concept of plane diffraction grating
3. Q2 A) Attempt any one
   • a) Describe the principle .construction and working of Michelson Interferometer
   • b) Explain the principle of Febry-Perot interferometer the formation of circular
4. Q2 B) Attempt any one. (7 M] Describe an expression for the resolving power of telescope.Comment on the result Show that for a plane transmission grating R.P.= nN at produces two P&Ctively If the Nt of the resolving Power em wide. Calculate the gratin t Wavelenght region 509 OA the free right angle to ea, Of the sup osition of the two lari
   • b) E to each other, Polarized wave, Plain the and Working their thickness What will happen wave , Polarized beam, are placed in the path of a plane the phenomena Of double Explain the concept of Polarization of of Huygen S principle ana the has refractive indices of Wavelength Plate for Fraunhaffer nine the least thickness of A Tight of 5800 A passes the The plate produces a path difference of plate he d. in their ordinary ray, thickness of the Ordinary ray:

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