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ENGINEERING PHYSICS, ASSIGNMENT UNIT-1 WAVE OPTICS, Following activities have been assigned to students for sessional assessment., Note:-Attempt any one, Last Date of Submission:-05/09/2018,, Max Marks = 10, 1. Assignment (Assignment questions are mentioned below, compulsory to attempt, assignment questions from all sections), 2. Model of Michelson’s Interferometer /Newtons Ring (not more than 3 students), 3. Poster of Michelson’s Interferometer-Newtons Ring/ Diffraction (Not more than two, students in a group), 4. PPT of wave optics interference part /diffraction part (Individual), ASSIGNMENT QUESTIONS, Section A, [Attempt any 5] (3 Marks question-Maximum half page/500 words) :1. How shall Michelson Interferometer be used to measure wavelength separation between, two closely spaced spectral lines say D1 and D2 lines of Sodium., 2. In Michelson interferometer 200 fringes cross the field of view when M1 is moved through, 0.05896 mm. Calculate the wavelength of light used. [Ans 5896Å], 3. A transmission grating has 500 ruling per mm If the slit are 1µm wide, find the missing, order. [Ans 2, 4, 6], 4. What should be the number of lines per cm in a plane transmission grating 2.5 cm wide so, as to just resolve the sodium spectral lines wavelengths 5890Å and 5896Å in the second, order spectrum. [Ans 196.4], 5. Derive the condition for the missing order spectra for a diffraction grating., 6. Explain Rayleigh criterion of resolution, 7. Explain how MI can be set for getting localized fringes.., Section B, [Attempt any 3] (10 Marks questions) :- Maximum 1 page/1000 words, 8. Explain with the help of diagram and experimental arrangements to produce Newton’s, rings. How will you use Newton’s rings to measure the wavelength of sodium light?, 9. What do you mean by resolving power of a grating? Derive an expression for the resolving, power of grating and discuss its dependency on constants of gratings., 10. Draw a labelled diagram of Michelson’s Interferometer. Explain the construction and, working., 11. Explain and derive Bragg’s law., Section C, (20 Marks questions)[Attempt all] :-–Maximum 4 pages, 12. Discuss the phenomenon of Fraunhofer diffraction at single slit and derive an expression, for the intensity of diffracted light. Show that the relative intensities of successive maxima, are nearly, 4, 4, 4, 1:, :, :, 9𝜋 25𝜋 49𝜋, 13. What is the plane transmission grating? Describe how you would employ it for, determining the wavelength of light. Derive an expression for the resultant intensity on screen, produced by N-parallel slits.