Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Electromagnetic Waves and Wave Optics/
Question 20218
JEE Physics · Easy

Electromagnetic Waves and Wave Optics: Single-Slit Diffraction — Minima MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Single-Slit Diffraction — MinimaEasyQuestion 20218

Question

In single-slit diffraction (slit width a), the first minimum occurs when:
  1. A
    a sinθ = λ
    Correct
  2. B
    a sinθ = λ/2
  3. C
    a sinθ = 2λ
  4. D
    a cosθ = λ

Correct answer

a sinθ = λ

Explanation

For single-slit diffraction, minima occur at a sinθ = mλ where m = ±1, ±2, ... The central maximum is widest (between the ±1st minima). Contrast with double-slit maxima at d sinθ = nλ.

Review Electromagnetic Waves and Wave Optics notesStart timed chapter practice