NCERT Class 12 Physics Chapter 10 Wave Optics MCQs & PYQ

In NCERT Class 12 Physics Chapter 10, "Wave Optics," students explore the behavior of light as a wave. This chapter delves into interference, diffraction, polarization, and Huygens’ principle, providing a comprehensive understanding of wave phenomena and their applications in modern science.
This article offers valuable resources for CBSE and CUET exam preparation, including sample MCQs and subjective questions. Downloadable PDFs for Class 12 Physics Chapter 10 MCQs and previous year questions are included for thorough practice of NCERT Class 12 Wave Optics.
NCERT Class 12 Physics Chapters
Chapter 1: Electric Charges and Fields
Chapter 2: Electrostatic Potential and Capacitance
Chapter 3: Current Electricity
Chapter 4: Moving Charges and Magnetism
Chapter 5: Magnetism and Matter
Chapter 6: Electromagnetic Induction
Chapter 7: Alternating Current
Chapter 8: Electromagnetic Waves
Chapter 9: Ray Optics and Optical Instruments
Chapter 11: Dual Nature of Radiation and Matter
Chapter 12: Atoms
Chapter 13: Nuclei
Chapter 14: Semiconductor Electronics Materials
Chapter 15: Communication Systems
Class 12 Physics Chapter 10 MCQs
This question bank includes previous years' CUET and CBSE MCQs, along with questions curated by subject experts. Below are 5 sample multiple-choice questions (MCQs) for Class 12 Physics Chapter 10: Wave Optics. For the full set of 50 questions, download the PDF using the link provided below.
1.
Select the correct answer from the codes (a), (b), (c) and (d) as given below.
Assertion (A): The phase difference between any two points on a wavefront is zero.
Reason (R): All points on a wavefront are at the same distance from the source and thus oscillate in the same phase.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
(c) Assertion (A) is true, but Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is also false.
2.
According to Huygens principle, the amplitude of secondary wavelets is 
(a) equal in both the forward and the backward directions.
(b) maximum in the forward direction and zero in the backward direction.
(c) large in the forward direction and small in the backward direction.
(d) small in the forward direction and large in the backward direction.
3.
A plane wavefront is incident on a concave mirror of radius of curvature R. The radius of the refracted wavefront will be:
(a) 2R           (b) R           (c)            (d)
4.
When a wave undergoes reflection at an interface from rarer to denser medium, adhoc change in its phase is :
(a)          (b) 0          (c) 𝜋          (d)
5.
Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
Assertion (A): In Young’s double slit experiment all fringes are of equal width.
Reason (R): The fringe width depends upon wavelength of light (𝜆) used, distance of screen from plane of slits (D) and slits separation (d).
(a) Both assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both assertion (A) and Reason (R) are true and Reason (R) is NOT the correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is also false.
 
Class 12 Physics Chapter 10 Subjective Questions Without Solutions
This question bank includes previous years' CBSE subjective questions (2 marks and above) without solutions, along with expert-curated questions. Below are 5 sample subjective questions for Class 12 Physics Chapter 10: Wave Optics. To access all questions, download the PDF from the link provided below.
1.
State Huygens principle. How did Huygens explain the absence of the backwave?
(CBSE 2023, 2M)
2.
Define the term wavefront. Using Huygen’s wave theory, verify the law of reflection.
(CBSE 2019, 3M)
3.
Using Huygens principle, draw a ray diagram showing the propagation of a plane wave refracting at a plane surface separating two media. Also verify Snell’s law of refraction.
(CBSE 2023, 2M)
4.
Use Huygens principle to show reflection / refraction of a plane wave by (i) concave mirror, and (ii) a convex lens.
(CBSE 2023, 2M)
5
A plane wavefront is incident on a surface separating two media of refractive indices n1 and n2 (> n1). With the help of a suitable diagram, explain its propagation from the rarer to denser medium. Hence, verify Snell’s law.
(CBSE 2022, 3M)
 
NCERT Science Subjects
Chemistry
Biology
Mathematics
Physical Education
NCERT Physics Topics
Chapter Name
Sub Topics of Chapter 10: Wave Optics
Wave Optics
10.1 Introduction
10.2 Huygens’ Principle
10.3 Coherent Sources and Interference of Light
10.4 Young’s Double-Slit Experiment
10.5 Diffraction
10.6 Polarization
Review of NCERT Class 12 Physics Chapter 10
NCERT Class 12 Physics Chapter 10, "Wave Optics," discusses light as a wave and explores interference, diffraction, and polarization. These phenomena demonstrate how light behaves in various environments and form the basis of optical technologies.
This chapter also introduces Huygens’ principle, helping students understand the fundamental nature of wave propagation. Mastery of NCERT Class 12 Wave Optics is crucial for solving problems related to wave behavior and understanding its practical applications in science and engineering.
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