Question
What colour of light is used for danger signals?
Answer
Red colour is used for danger signal.
Reason: Red has a long wavelength and is easily visible from a distance, even in low light conditions.
Question
VSA : What colour of light is used for danger signals?
- Light
WhatsApp
Didn't liked the above answer ?
×
![Crop Image]()
💡 Some Related Questions
State whether true or false: (i) A convex mirror is used as a driver’s mirror. (ii) The absolute refractive index of a medium can be less than unity. (iii) A band of seven colours of white light is called the spectrum. (iv) In a photographic camera, a concave lens is used. (v) To correct long-sightedness a concave lens of suitable focal length is used.
Open Answer »