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Question
Why is the colour red used as a sign of danger?
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Solution
Red colour is used as a sign of danger due to its greater wavelength and lesser deviation (scattering).
RELATED QUESTIONS
The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°, Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.
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