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Chapter 20 of 28
Formula Sheet

Wave OpticsFormula Sheet

KEAM · Physics

Free Wave Optics formula sheet for KEAM Physics 2026 — all important formulas, equations, and constants for quick reference.

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Illustrates Huygens' principle, showing a primary wavefront and how each point on it acts as a source of secondary wavelets, forming a new wavefront.
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Formula Sheet — Wave Optics

Important formulas and equations from Wave Optics for KEAM Physics.

Formulas — Wave Optics

Huygens Principle and Wavefronts

v = fλ
c = 3 × 10⁸ m/s

Reflection and Refraction using Huygens Principle

sin i / sin r = c/v = μ
∠i = ∠r

Coherent Sources and Interference

I = 4I₀cos²(φ/2)
R = √(a₁² + a₂² + 2a₁a₂cosφ)
Iₘₐₓ/Iₘᵢₙ = (√I₁ + √I₂)²/(√I₁ - √I₂)²

Young's Double Slit Experiment

x = nλD/d
x = (n+1/2)λD/d
β = λD/d
Path difference = xd/D

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Frequently Asked Questions

What topics are covered in Wave Optics for KEAM?
Wave Optics is an important chapter in KEAM Physics. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Huygens Principle and Wavefronts, Coherence and Superposition, Young's Double Slit Experiment, Thin Film Interference.
How important is Wave Optics for KEAM?
Wave Optics is a frequently tested chapter in KEAM Physics. Questions from this chapter appear regularly in previous year papers. There are 280 practice questions available for this chapter.
How to prepare Wave Optics for KEAM?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.

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Practice questions, revision notes, formula sheet and AI doubt-solver for KEAM Physics.