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Important Questions

Spectrum

ICSE · Class 10 · Physics

Most important questions from Spectrum for ICSE Class 10 Physics board exam 2026. MCQs, short answer, and long answer questions with marks.

44 questions20 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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44 Questions·
multiple choicemultiple correcttrue false

Sample Questions

1multiple correct

Which of the following are properties of electromagnetic waves?

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Travel at speed of light, Do not require medium, Are transverse in nature, Have same frequency in all media

Electromagnetic waves travel at 3×10⁸ m/s, don't need medium, are transverse, and maintain frequency during refraction. They are NOT deflected by electric or magnetic fields.

2true false

The total deviation produced by a prism is the sum of deviations at both surfaces.

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True

When light passes through a prism, it refracts at both surfaces. The total deviation δ = δ₁ + δ₂, where δ₁ and δ₂ are deviations at the first and second surfaces respectively.

3multiple correct

Which colors deviate the most and least when white light passes through a prism?

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Violet deviates most, Red deviates least

Violet has the shortest wavelength and highest refractive index, causing maximum deviation. Red has the longest wavelength and lowest refractive index, causing minimum deviation.

4multiple choice

The phenomenon of splitting white light into its constituent colors is called:

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Dispersion

Dispersion is the phenomenon where white light splits into its seven constituent colors (VIBGYOR) when passed through a prism due to different refractive indices for different wavelengths.

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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 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Spectrum?
There are 44 practice questions available for Spectrum. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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