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InsemSep 20242019 patternFE

Engineering Physics SPPU Insem Question Paper Sep 2024

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Engineering Physics questions
Subject code
107002
Pattern
2019 pattern
Exam
Insem
Session
Sep 2024
Max. marks
30
Time
1 Hour
Semester
I
Paper code
[6358]-102

Printed for: F.E. (Common) (Insem)

Instructions to the candidates

  1. Solve Q1 or Q2, Q3 or Q4.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicate full marks.
  4. Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed.
  5. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      For a single slit, state the equations for resultant amplitude and resultant intensity when rays are diffracted at an angle  . Starting from these equations derive the conditions for principal maxima and minima of diffraction pattern. Draw intensity distribution curve.

      [6]
    2. b)

      What are electromagnetic radiations? State one application for any four regions in the electromagnetic spectrum.

      [5]
    3. c)

      The axes of polarizer and analyzer are kept parallel to each other so that light is transmitted with maximum intensity. By what angle should either polarizer or analyzer be rotated so that intensity of transmitted light is (i) 42% and (ii) 68% of the original intensity.

      [4]

  2. Q2

    1. a)

      What is double refraction? Draw a neat and labelled diagram showing double refraction in a birefringent crystal. Explain in brief properties of o-ray and e-ray.

      [6]
    2. b)

      What is anti-reflection coating (ARC)? Explain with a neat & labelled diagram how the principle of interference is used to design ARC. Derive the equation for thickness of ARC.

      [5]
    3. c)

      A plane diffraction grating has 5000 lines/cm. A light of wavelength 558 nm incident normally over it. Determine the highest order spectrum that is visible. 2

      [4]

  3. Q3

    1. a)

      With the help of an energy level diagram, explain construction and working of CO 2 laser.

      Also asked:Mar 2026 ·Feb 2026 ·Oct 2025 ·Apr 2025 ·Mar 2025 ·Mar 2024

      [6]
    2. b)

      What is Holography? Why laser is preferred in holography? With a suitable diagram, explain the process of recording a hologram by using laser.

      Also asked:Mar 2026 ·Mar 2025 ·Mar 2024 ·Oct 2023 ·Oct 2022

      [5]
    3. c)

      In a certain optical fiber, the angle of acceptance is 34.8º and refractive index of cladding is 1.52. Calculate the values of numerical aperture and refractive index of core.

      Also asked:Feb 2026 ·Nov 2024 ·Oct 2023 ·Oct 2022

      [4]

  4. Q4

    1. a)

      In an optical fiber, Explain in brief why refractive index of cladding should be slightly less than that of the core. Differentiate between step index and graded index fiber (any four points).

      [6]
    2. b)

      What is acceptance angle? In an optical fiber, core and cladding has refractive indices 1.61 and 1.42 respectively. Calculate the values of acceptance angle and numerical aperture.

      Also asked:Mar 2024

      [5]
    3. c)

      In laser, explain in brief : i) Spontaneous emission ii) Stimulated emission 

      [4]