BSc Sem II 2012 2014 2014 Phy Ll Question Paper - Mumbai University | munotes

Questions asked in this paper

• ii) Figures to the right indicate ful} marks

1. Q1 Answer the following: Three)
   • a) A particle is Subjected to to perpendicular SHM’s x= Acoswt and Acos(wt — =) Find trajectory of the Particle,
   • b) Explain the Concept of centre of mass of a System of particles, Define Simple Harmonic Motion. Show that a particle whose potential energy is % kx? where k is a constant SHM masses 2kp 3kg and 4kg are located at 4) and (3, 1, 2) Find the centre of Mass of this system
2. Q2 Answer the following: ~(Any Three) the lenses & L2 of focal length f; and are placed Parallel to each other along the optic axis than derive an for focal length of a combination,
   • b) Explain the term “deviation in case of lens”. Hence Prove that the deviation does not depend on the position of object, With a Suitable Tay diagram, spherical Abberation of lens, State the method of
   • d) Describe how will you determine Refractive Index of Prism using
3. Q3 Answer the following: Three) [1SMarks]
   • a) Draw labelled-diagram of thé following:
   • i) Laser cutter and li) A typical system
   • b) Explain the following terms: i) Monochromaticity
   • iii) Coherence
   • iv) Intensity and Power
   • c) Explain recording of the Hologram
   • d) Calculate the numerical aperture of a step index fibre for an optical fibre that have a core of refractive index 1.5 and cladding of index 1.48. also determine the maximum angle for entrance of light if the fibre is put in air Answer the following: --(Any Three) [1SMarks]
   • a) Determine :
   • i) The critical angle of reflection for core-cladding boundry and ii) The angle of the fiber Given : Refractive index of core=n1=1.4 Refractive index of cladding=n2=1.3
   • b) Give a brief account of lasers
   • c) A particle is subjected to two parallel SHM’s given by, and sin + and x2=3 — =) in cm. Write the of the resultant SHM
   • d) Two parallel simple harmonic motion described by sin(wt+@,) and X2=A2 sin (wt+@,) are superimposed on a Particle. Show that the.amplitude of the resultant SHM is equal to: when the component motions are in phase and
   • ii)A1-A2 when they are in Opposite phase, an expression for kinetic energy of a system of a Particle in Centre of Mass CO-ordinate

Read from the scan above, so a character or two may differ. The scan is the original.