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InsemMar 20262019 patternFE

Engineering Physics SPPU Insem Question Paper Mar 2026

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
Mar 2026
Max. marks
30
Time
1 Hour
Semester
II
Paper code
APR-26/FE/Insem-3

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

Instructions to the candidates

  1. Answer Q.1 or Q.2 and Q.3 or Q.4.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicates full marks.
  4. Assume suitable data if necessary.

Questions

  1. Q1

    1. a)

      Derive an expression for condition of maxima and minima for reflected light in case of uniform thickness thin transparent film.

      [6]
    2. b)

      What is diffraction of light? Distinguish between Fraunhofer and Fresnel diffraction.

      [5]
    3. c)

      How should the polarizer and analyser be oriented to reduce the beam of light to 25% of its original intensity?

      [4]

  2. Q2

    1. a)

      Obtain the condition for principal maximum and minimum in fraunhofer diffraction due to a single slit.

      [6]
    2. b)

      Explain double refraction phenomenon with the help of Huygen wave theory.

      Also asked:Feb 2026 ·Oct 2025 ·Apr 2025 ·Nov 2024 ·Mar 2024 ·Oct 2023 ·Oct 2022

      [5]
    3. c)

      A glass microscope lens (  =1.5) is coated with magnesium fluoride (  f =1.38) film to increase the transmission of normally incident light of wavelength 5800AU. What minimum film thickness should be deposited on the lens? 2 APR-26/FE/Insem-3

      [4]

  3. Q3

    1. a)

      Describe principal, construction and working of CO 2 Laser.

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

      [6]
    2. b)

      Define optical fibres. Explain step index fibre and graded index fibre.

      Also asked:Oct 2022

      [5]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [4]

  4. Q4

    1. a)

      Explain numerical aperture, acceptance angle and acceptance cone with required mathematical expression.

      [6]
    2. b)

      What is holography? Explain the process of hologram recording.

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

      [5]
    3. c)

      Explain : i) Population inversion ii) Resonant cavity 

      [4]