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Visible
Visible light is the small part of the electromagnetic spectrum that can be detected by the human eye.
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Visible
Recommended for Class 10
Visible
Visible light is the small part of the electromagnetic spectrum that can be detected by the human eye.
Its approximate wavelength range is around:
400 nm to 700 nm
The exact limits vary with definition and human sensitivity.
Colour and Wavelength
Approximate order from longer to shorter wavelength:
Red → Orange → Yellow → Green → Blue → Violet
Red has longer wavelength and lower frequency.
Violet has shorter wavelength and higher frequency.
Uses
Visible light is used in:
vision; photography; optical communication; microscopes; telescopes; lighting.
White Light
White light contains a range of visible wavelengths.
A prism can separate these wavelengths through dispersion.
Visible — Advanced
Common Mistakes
Common Mistakes
- Mistake
Visible light is only a small part of the EM spectrum.
- Mistake
Red has lower frequency than violet.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
Visible ≈ 400–700 nm.
Red → long λ.
Violet → short λ.
- Definition
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Practice
PQ
Q1. Define visible light.
PQ
Q2. State the approximate visible range.
PQ
Q3. Compare red and violet wavelength/frequency.
PQ
Q4. What is white light?
PQ
Q5. What does a prism do to white light?
Exam Practice
EQ
Q1. Define visible light.
EQ
Q2. State the approximate visible range.
EQ
Q3. Compare red and violet wavelength/frequency.
EQ
Q4. What is white light?
EQ
Q5. What does a prism do to white light?
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.