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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.

43 questions33 flashcards5 concepts

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A comprehensive infographic displaying the entire electromagnetic spectrum, ordered by increasing wavelength and decreasing frequency (or vice-versa). It should include different regions like Gamma ra
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Key Topics to Revise

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1. Deviation, Dispersion and Spectrum

  • A prism is a triangular optical device with two refracting surfaces.
  • A ray passing through a prism suffers deviation at both surfaces.
  • Total deviation through a prism is the sum of deviations at the two refracting surfaces.
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2. Visible Spectrum and Invisible Spectrum

  • Visible light is the part of the electromagnetic spectrum detected by human eyes.
  • Visible light is listed as 4000-8000 A.U. in the electromagnetic spectrum table, and the visible spectrum is also described as 4000 to 7800 A.U. in the text.
  • Ultraviolet and infrared radiations are examples of invisible radiations.
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3. Electromagnetic Spectrum

  • Electromagnetic waves are classified according to frequency or wavelength, and this arrangement is called the electromagnetic spectrum.
  • Electromagnetic waves are transverse waves and do not require a medium to travel.
  • They travel with uniform speed 3×10^8 m/s.
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4. Properties of Electromagnetic Waves

  • Gamma rays cause fluorescence, have high penetrating power, easily pass through the human body, and cause immense biological damage.
  • X-rays are chemically more active than UV rays, affect photographic plates, cause fluorescence with zinc sulphide, and penetrate the human body except bones.
  • Ultraviolet radiations travel at the speed of light, are scattered by dust, affect photographic plates, produce fluorescence, and obey the laws of reflection and refraction.

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Full Notes

Key Concepts

A ray of light passing throughThe phenomenon of splitting of whiteThe beautiful pattern of seven coloursThe refractive index of glass increasesDifferent colours travel with different speeds

Frequently Asked Questions

What are the important topics in Spectrum for ICSE Class 10 Physics?
Key topics in Spectrum include Correct vs Incorrect Understanding of Dispersion Through a Prism, Spectrum Chapter — Complete Concept Map, Spectrum Chapter — Complete Concept Map. These are the concepts ICSE Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Spectrum — ICSE Class 10 Physics?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and 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 12 chapters — ICSE Class 10 Physics Revision Notes

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