Young’s Double Slit Experiment MCQs

Prepare for Young’s Double Slit Experiment MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

26 Solved Questions • 20 Mins Practice • Updated for 2026 Competitive Exams
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2026 Solved Edition · Updated October 2026 · Verified Editorial Standards

Welcome to the verified preparation module for Young’s Double Slit Experiment MCQs on McqsMind. This comprehensive set offers solved multiple-choice questions with answers, detailed explanations, and authentic past-paper style questions aligned with the latest syllabus of Physical Optics (Physics).

100% Verified Answer Keys CSS, PMS, FPSC, PPSC, NTS Ready 2026/2027 Syllabus Guidelines

Direct Definition & Conceptual Scope

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Young’s Double Slit Experiment constitutes an essential examination topic within Physics, evaluating theoretical principles, historical context, and practical problem-solving applications. On MCQsMind, candidates practice verified past-paper solutions, conceptual breakdowns, and syllabus-aligned questions tailored for CSS, PMS, and competitive screening examinations.

Solved Questions

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26 MCQs Page 1

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Topic Notes: Young’s Double Slit Experiment

Quick Revision 2 min read 14 key points
Section 1 of 4

1 1. Fundamental Principles

4 points
  • Definition
    Young’s Double Slit Experiment (YDSE): A classic optical experiment demonstrating the wave nature of light through the observation of interference patterns produced by two coherent sources.
  • Definition
    Coherent Sources: Light sources that maintain a constant phase difference over time, a prerequisite for stable interference patterns in YDSE.
  • Theory
    Principle of Superposition: The resultant displacement at any point in the interference pattern is the algebraic sum of the displacements of individual waves arriving from the two slits.
  • Fact
    Monochromatic Light: Essential in YDSE to ensure that the wavelength remains constant, preventing the overlapping of different color fringes which would blur the pattern.
Section 1 / 4
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1
In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with 30 divisions of the vernier scale. If the smallest division of the main scale is half-degree (=0.5°), then the least count of the instrument is
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2
If the mass attached to a spring is made four times, the time period will
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3
If the mass attached with a spring becomes four times, the time period of vibration becomes:
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4
The area to be covered for T.V. telecast is doubled. Then the height of transmitting antenna (T.V. tower) will have to be
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5
In YDS experiment, if the distance between the slits and also the distance between slits and screen is doubled, the fringe width:
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6
If the separation between the slits is reduced to half and the distance of the screen from the slits is doubled, then the fringe width is
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7
Fringe spacing in double slit experiment can be increased by decreasing
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8
In case of YDS experiment, the fringe spacing varies ______ with slit separation d and varies ______ with distance L between slits and screen.
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9
In a double slit experiment, instead of taking slits of equal widths, one slit is made twice as wide as the other. Then, in the interference pattern
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10
In the double slit experiment, if a glass slab is introduced in the path of light from the slits to the screen
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Pedagogical Syllabus Blueprint

Young’s Double Slit Experiment MCQs: Preparation Strategy & Exam Blueprint

Examination Weightage & Commission Distribution

In Pakistan's premier competitive examinations—including the Federal Public Service Commission (FPSC General Recruitment & CSS MPT), Punjab Public Service Commission (PPSC Lecturer, Tehsildar & PMS Screening), KPPSC, SPSC, and BPSC—questions derived from Young’s Double Slit Experiment MCQs consistently constitute a decisive 10% to 25% weightage of the Physical Optics paper. Testing agencies frequently evaluate both foundational factual recall and deeper analytical comprehension, requiring aspirants to master key dates, statutory articles, constitutional clauses, and thematic definitions.

High-Yield Conceptual Pillars & Distractor Analysis

Historical trend analysis across past five-year examination cycles demonstrates that examiner traps frequently involve closely matched numerical alternatives, chronologically contiguous treaties, and semantic subtleties in statutory phraseology. When preparing Young’s Double Slit Experiment MCQs, candidates must deliberately review the underlying rationale provided for every question rather than merely memorizing raw answer options. Understanding why incorrect distractors fail is the most reliable predictor of achieving top percentiles in computerized and optical mark recognition (OMR) screening tests.

Negative Marking Mitigation & Time Management Protocol

For examinations enforcing negative marking penalties (such as PPSC's 0.25-mark deduction per erroneous response or NTS gatekeeper quotas), an aggressive elimination technique must be deployed. Candidates should systematically rule out improbable options first to elevate probability thresholds from 25% to 50% or 100%. Allocating an average of 45 to 60 seconds per item during mock trials builds the psychological stamina and cognitive precision required to complete 100-question papers within official 90-minute time limits.

Recommended Reference Sources & Statutory Reading

To achieve definitive conceptual mastery in Physics, candidates are advised to cross-reference our solved explanations with primary gazettes, statutory texts, and canonical academic textbooks. Verifying controversial questions against authentic official repositories guarantees that prospective civil servants and professional candidates present incontestable answers during both optical paper evaluations and viva voce departmental interviews.