Spectrum — Important Questions
ICSE · Class 10 · Physics
43 important questions from Spectrum for ICSE Class 10 Physics, with answers. Includes multiple choice, multiple correct and true false questions.
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See them allImportant Questions from Spectrum
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.
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.
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.
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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