Edexcel IGCSE Physics · Spec 3.11-3.13
Visible Colours, Electromagnetic Uses and Hazards
Covers order visible-light colours, Match named waves to uses and Explain hazards and protection.
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Visible Colours, Electromagnetic Uses and Hazards
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Spec 3.11-3.13
What you need to know
- Order visible-light colours
- Match named waves to uses
- Explain hazards and protection
Active recall
Quick check
Answer each question before opening the answer.
List visible colours from longest wavelength
Red, orange, yellow, green, blue, indigo, violet
Name one ultraviolet use
Fluorescent lamps or security marking
Why are gamma rays especially hazardous?
They are penetrating ionising radiation that can damage DNA and cause mutations
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