BPHCT 137 Waves And Optics Solved Assignment in English Medium 2026

BPHCT 137 Solved Assignment 2026 is specially prepared for students of BPHCT 137 Waves And Optics who want strong conceptual clarity and better internal marks in physics. This assignment covers electromagnetic waves, polarisation, interference, diffraction, Fresnel patterns, reflection and transmission coefficients, elliptically polarised light, resolving power, laser principles, fibre optics and numerical aperture. Solutions are written step-by-step in simple language with proper derivations and explanations so you can understand the logic clearly and write accurate answers confidently in your exams.

BPHCT 137 Assignmen Questions (As Per Official TMA)

All questions are included exactly as provided in the official assignment booklet :contentReference[oaicite:0]{index=0}.

PART A

1. a) The sodium lamp used in a physics laboratory gives out light uniformly. Suppose that the lamp uses 40 W. Calculate the magnitude of electric field. b) Describe polarisation of light by reflection. How does degree of polarisation vary with angle of incidence of light? c) Discuss the concept of missing orders with reference to double slit diffraction pattern. d) Depict spatial evolution of Fresnel diffraction pattern.
2. a) Obtain expressions for reflection and transmission amplitude coefficients when electric vector associated with a plane monochromatic electromagnetic wave is in the plane of incidence. b) Obtain an expression for elliptically polarised light resulting due to superposition of two orthogonal linearly polarised light waves. Show that plane polarised light and circularly polarised light are special cases of elliptically polarised light.
3. a) Obtain the expression for shift in fringes when a thin transparent sheet is introduced in the path of one of the waves in a double slit interference experiment. b) Numerical problem based on Newton’s rings to calculate refractive index of the liquid.

PART B

4. a) Diffraction through a single slit and calculation of angles of minima and separation on screen. b) Discuss Rayleigh’s criterion and obtain resolving power of a microscope.
5. a) Show that absorption dominates stimulated emission in thermal equilibrium and comment on laser action. b) Calculate fraction of atoms in upper energy level at 400 K. c) Calculate numerical aperture and light gathering capacity of optical fibre.

BPHCT 137 Assignments Details

Course Code: BPHCT-137
Course Title: Waves And Optics
Assignment Code: BPHCT-137/TMA/2026
Maximum Marks: 100
Weightage: 30% in Final Assessment

BPHCT 137 Assignment Submission End Date-upto

For the students enrolled in July 2025 – 30th April 2026 – Submit to the Coordinator of the learner support center.
For the students enrolled in January 2026 – 30th September 2026 – Submit to the Coordinator of the learner support center.

Why Choose Our BPHCT 137 IGNOU Solved Assignments?

• Step-by-step derivations and numerical solutions so you clearly understand each formula and concept instead of memorising blindly.
• Proper diagrams explanation and logical flow in theory answers for better presentation and higher marks.
• Strictly prepared according to 2026 assignment booklet covering both Part A and Part B completely.
• Complex topics like polarisation, diffraction and laser physics explained in simple and easy language.
• Accurate calculations shown clearly to avoid common numerical mistakes.
• Helps in both assignment preparation and strong revision for term-end examination.

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FAQs

Is BPHCT 137 difficult?

BPHCT 137 can seem challenging because it involves mathematical derivations and numerical problems. However, if you understand the basic concepts of waves, interference, diffraction and optics step-by-step, it becomes manageable. Clear derivations and practice of numericals make a big difference in scoring well.

Is this BPHCT 137 Solved Assignment valid for 2026?

Yes, this assignment is prepared strictly according to the official 2026 booklet and is valid for the current session. All questions from Part A and Part B are covered completely.

Can I directly submit this PDF to IGNOU?

No, you must write the assignment in your own handwriting on foolscap or A4 sheets as per instructions. This PDF is meant for guidance and understanding only.

How important is the assignment in final result?

The assignment carries 30% weightage in your overall assessment. Submitting a well-written and properly structured solution can significantly improve your final grade.

How will I receive the BPHCT 137 Solved Assignment?

After successful payment, you will receive the PDF for instant download. It is organised question-wise and easy to follow for preparation.

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