Class 12 Physics MCQ Chapter 10 Wave Optics
Looking for important Class 12 Physics MCQ Chapter 10 Wave Optics English Medium questions for AHSEC exam preparation? This article provides a well-structured collection of multiple-choice questions (MCQs) with answers that will help Higher Secondary students revise the chapter thoroughly and improve their Physics scores.
The chapter Wave Optics introduces the wave nature of light and explains various optical phenomena through wave theory. Students will study key concepts such as Huygens’ principle, interference of light, Young’s double-slit experiment, diffraction, polarization, and the practical applications of wave optics. These topics are essential for understanding modern optics and frequently appear in AHSEC board examinations.
Our MCQs are prepared according to the latest AHSEC syllabus and examination pattern, ensuring that students practice relevant and exam-focused questions. By solving these objective questions regularly, students can strengthen conceptual understanding, improve analytical thinking, and become more confident in answering Physics MCQs during examinations.
Whether you are revising the chapter before a test or preparing for the AHSEC Higher Secondary Final Examination, these Chapter 10 MCQ solutions will help you identify important concepts and achieve better academic performance.
PART II
Class 12 Physics MCQ Chapter 10 Wave Optics
VSA & MCQ
I. Very Short Answer Questions
Q. What is wave optics?
Ans: Wave optics studies light as a wave and explains interference, diffraction and polarization.
Q. What is interference of light?
Ans: Redistribution of intensity due to superposition of waves.
Q. What are coherent sources?
Ans: Sources with constant phase difference and same frequency.
Q. What is constructive interference?
Ans: When waves add to give maximum intensity.
Q. What is destructive interference?
Ans: When waves cancel to give minimum intensity.
Q. What is path difference for constructive interference?
Ans: Δx = nλ.
Q. What is path difference for destructive interference?
Ans: Δx = (2n + 1)λ/2.
Q. What is Young’s double slit experiment?
Ans: Demonstration of interference using two coherent sources.
Q. What is fringe width?
Ans: β = λD / d.
Q. What is diffraction?
Ans: Bending of light around obstacles.
Q. What is condition for diffraction maximum (single slit)?
Ans: a sinθ = nλ.
Q. What is central maximum?
Ans: Bright fringe at center.
Q. What is polarization?
Ans: Restriction of vibrations in one direction.
Q. What type of waves show polarization?
Ans: Transverse waves.
Q. What is unpolarized light?
Ans: Light vibrating in all directions.
Q. What is polarized light?
Ans: Light vibrating in one direction.
Q. What is Brewster’s law?
Ans: tan i_p = n.
Q. What is polarizing angle?
Ans: Angle at which reflected light is fully polarized.
Q. What is intensity relation in interference?
Ans: I = I₁ + I₂ + 2√(I₁I₂) cosφ.
Q. What is Huygens’ principle?
Ans: Every point on wavefront is a source of wavelets.
Q. What is wavefront?
Ans: Surface of constant phase.
Q. Types of wavefronts?
Ans: Spherical, plane, cylindrical.
Q. What is coherence length?
Ans: Distance over which phase relation is maintained.
Q. What is diffraction grating?
Ans: Many slits producing diffraction.
Q. What is resolving power?
Ans: Ability to distinguish two close points.
Q. What is Rayleigh criterion?
Ans: Limit of resolution condition.
Q. What is intensity of central maximum?
Ans: Maximum intensity.
Q. What is condition for minima in single slit?
Ans: a sinθ = nλ.
Q. What is optical path difference?
Ans: Difference in path multiplied by refractive index.
Q. What is phase difference?
Ans: Difference in phase between waves.
II. Multiple Choice Questions
Q. Interference occurs due to:
(a) Reflection
(b) Superposition
(c) Refraction
(d) Dispersion
Ans: (b)
Q. Coherent sources have:
(a) Same phase
(b) Constant phase difference
(c) Different frequency
(d) Random phase
Ans: (b)
Q. Fringe width is:
(a) λd/D
(b) λD/d
(c) d/λD
(d) None
Ans: (b)
Q. Diffraction occurs when:
(a) Light bends
(b) Reflects
(c) Absorbs
(d) Emits
Ans: (a)
Q. Polarization proves light is:
(a) Longitudinal
(b) Transverse
(c) Scalar
(d) Stationary
Ans: (b)
Q. Brewster angle relation is:
(a) sin i = n
(b) tan i = n
(c) cos i = n
(d) sec i = n
Ans: (b)
Q. Central maximum is:
(a) Dark
(b) Bright
(c) Zero
(d) Random
Ans: (b)
Q. Wavefront is:
(a) Line
(b) Surface
(c) Point
(d) Area
Ans: (b)
Q. Huygens principle explains:
(a) Reflection
(b) Refraction
(c) Wave propagation
(d) Charge
Ans: (c)
Q. Resolving power measures:
(a) Intensity
(b) Distance
(c) Separation ability
(d) Frequency
Ans: (c)
Q. Assertion: Interference produces bright and dark fringes. Reason: Superposition of waves occurs.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Diffraction occurs in all waves. Reason: Wave nature causes bending.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Polarization is shown by transverse waves. Reason: Longitudinal waves cannot be polarized.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Fringe width depends on wavelength. Reason: β = λD/d.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Central maximum is brightest. Reason: Maximum constructive interference.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Huygens principle explains wavefront. Reason: Each point acts as source.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Resolving power depends on wavelength. Reason: Shorter wavelength gives better resolution.
(a) Both true, reason incorrect
(b) Both true, reason correct
(c) Assertion true, reason false
(d) Both false
Ans: (b)
