BE Civil Engineering
BE Computer Engineering
BE Mechanical Engineering
BE Biotechnology
BE Marine Engineering
BE Printing and Packaging Technology
BE Production Engineering
BE IT (Information Technology)
BE Electrical Engineering
BE Electronics and Telecommunication Engineering
BE Instrumentation Engineering
BE Electronics Engineering
BE Chemical Engineering
BE Construction Engineering
BE Biomedical Engineering
BE Automobile Engineering
Academic Year: 2017-2018
Date: December 2017
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1) Question no 1 is Compulsary .
2) Attempt any three questions from Q . 2 to Q . 6.
Why the Newton’s rings are circular and centre of interference pattern (reflected) is dark?
Chapter: [7] Interference and Diffraction of Light
What is Rayleigh’s criterion of resolution? Define resolving power of grating?
Chapter: [7] Interference and Diffraction of Light
Calculate the V number of an optical fibre having numerical aperture 0.25 and core diameter 20 μm, if its operating wavelength is 1.55 μm.
Chapter:
What is pumping in LASER? Give the types of pumping.
Chapter: [8] Lasers
Show that the divergence of curl of a vector is zero.
Chapter: [10] Electrodynamics
⦁ Determine the magnetic field required to bend a beam consisting of electrons of speed 3 × 107 m/s in a circle of radius 5 cm.
Chapter: [11] Charge Particle in Electric and Magnetic Fields
What will be the fringe pattern if wedge shaped air film is illuminated with white light?
Chapter: [7] Interference and Diffraction of Light
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Obtain the condition for maxima and minima of the light reflected from a thin transparent film of uniform thickness. Why is the visibility of the fringe much higher in the reflected system than in the transmitted system.
Chapter: [7] Interference and Diffraction of Light
What is Numerical aperture? Explain the use of optical fibre in temperature sensor. The core diameter of a multimode step index fibre is 50 μm. The numerical aperture is 0.25. Calculate the number of guided modes at an operating wavelength of 0.75 μm.
Chapter: [9] Fibre Optics
Explain the experimental method to determine the wavelength of spectral lines using grating. A diffraction grating has 5000 lines / cm and the total ruled with is 5cm. Calculate dispersion for a wavelength of 5000 A0 in the second order.
Chapter: [7] Interference and Diffraction of Light
Explain construction and working of Nd: YAG laser.
Chapter: [8] Lasers
Explain spherical co-ordinate system. State the transformation relation between Cartesian and spherical co-ordinates.
Chapter: [10] Electrodynamics
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Explain construction and working of cathode ray tube.
Chapter: [11] Charge Particle in Electric and Magnetic Fields
A wedge shaped air film having angle 40 seconds is illuminated by monochromatic light. Fringes are observed vertically through a microscope. The distance between 10 consecutive dark fringes is 1.2 cm. find the wavelength of monochromatic light used.
Chapter: [7] Interference and Diffraction of Light
With neat diagram explain construction and working of atomic force microscope.
Chapter: [12] Nanoscience and Nanotechnology
Derive Maxwell’s two general equations in integral and differential form.
Chapter: [10] Electrodynamics
an electron is accelerated through a potential difference of 5kv and enters a uniform magnetic field of 0.02 wb/m2 acting normal to the direction of electron motion. Determine radius of the path.
Chapter: [11] Charge Particle in Electric and Magnetic Fields
What are the different techniques to synthesise nanomaterial? Explain one of them in detail.
Chapter: [12] Nanoscience and Nanotechnology
What is holography? Differentiate between holography and photography.
Chapter: [8] Lasers
Describe in detail the concept of anti-reflecting film with a proper ray diagram.
Chapter: [7] Interference and Diffraction of Light
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University of Mumbai previous year question papers Semester 2 (FE First Year) Applied Physics 2 with solutions 2017 - 2018
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