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Reflection and Refraction of Light — Formula Sheet

NIOS · Class 12 · Physics

10 formulas from Reflection and Refraction of Light (NIOS Class 12 Physics) on one page, grouped by topic. Includes Law 2.

45 questions31 flashcards10 formulas & key relations5 concepts

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An illustration showing light traveling in straight lines from a point source, casting sharp shadows, demonstrating the principle of rectilinear propagation.
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10 Entries · 5 Sections

Formulas and Key Relations

Reflection at Spherical Mirrors

1/f = 1/v + 1/u

f = R/2

m = -v/u = h2/h1

Refraction of Light and Snell's Law

sin i / sin r = μ₁₂ = c₁/c₂

μ = c/v

μ_wg = μ_ag / μ_aw

μ₁ sin i = μ₂ sin r

Total Internal Reflection (TIR)

sin iₒ = 1/μ or μ = 1/sin iₒ

Refraction at Spherical Surface

μ₂/v - μ₁/u = (μ₂ - μ₁)/R

Reflection of Light – Laws and Spherical Mirrors

Law 2

Angle of incidence (∠i) = Angle of reflection (∠r). This holds for both plane and spherical mirrors.

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Frequently Asked Questions

What are the important topics in Reflection and Refraction of Light for NIOS Class 12 Physics?
Key topics in Reflection and Refraction of Light include Reflection of Light – Laws and Spherical Mirrors, Refraction of Light – Snell's Law and Refractive Index, Total Internal Reflection (TIR) and Its Applications, Refraction at a Spherical Surface. Study these first, then practise questions on each for the NIOS Class 12 board exam.
How many formulas are in Reflection and Refraction of Light?
This sheet lists 10 formulas from Reflection and Refraction of Light, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Reflection and Refraction of Light for the NIOS Class 12 board exam?
Learn the core ideas first, then work through the 45 practice questions on Reflection and Refraction of Light. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All NIOS Class 12 Physics Formula Sheet

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