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Spectrum

ICSE · Class 10 · Physics

Quick revision notes for Spectrum — ICSE Class 10 Physics. Key concepts, formulas, and definitions for last-minute revision.

44 questions20 flashcards5 concepts

Key Topics to Revise

1

Deviation, Dispersion and Spectrum

  • Deviation occurs when light passes through a prism due to refraction at two surfaces
  • Total deviation δ = δ₁ + δ₂ (sum of deviations at both surfaces)
  • Deviation depends on: angle of incidence, angle of prism, refractive index of material
2

Electromagnetic Spectrum

  • Electromagnetic waves consist of oscillating electric and magnetic fields
  • Electromagnetic spectrum is orderly classification of EM waves by frequency/wavelength
  • Visible spectrum: wavelength range 4000-8000 Å, detected by human eyes
3

Scattering of Light

  • Scattering is absorption and re-emission of light by particles in atmosphere
  • Intensity of scattered light is inversely proportional to fourth power of wavelength
  • I ∝ 1/λ⁴ (Rayleigh scattering)

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Full Notes

Key Concepts

When light passes through a prismDispersion is the splitting of whiteA spectrum is the beautiful bandThe electromagnetic spectrum is the completeScattering is the process where light

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Frequently Asked Questions

What are the important topics in Spectrum for ICSE Class 10 Physics?

Spectrum covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

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

Previous Chapter

Refraction through a lens

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Sound

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All 12 chapters — ICSE Class 10 Physics Revision Notes