Class 10 Exam > Class 10 Questions > The danger signals are red in colour because ...
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The danger signals are red in colour because it is
- a)strongly scattered by fog or smoke
- b)least scattered by fog or smoke
- c)least absorbed by fog or smoke.
- d)strongly absorbed by fog or smoke
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The danger signals are red in colour because it isa)strongly scattered...
The danger signals are red because among all other colours, red colour is scattered the least by smoke or fog. This is primarily because wavelength of red colour is the largest.
Most Upvoted Answer
The danger signals are red in colour because it isa)strongly scattered...
Because red lies on the down on VIBGYO"R" and it has longest wave length than other colours.
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Community Answer
The danger signals are red in colour because it isa)strongly scattered...
Explanation:
Scattering of light by fog or smoke:
- When light passes through a medium like fog or smoke, it interacts with the particles present in the medium.
- The process of scattering causes the light to change its direction, making it appear hazy or diffused.
Why are danger signals red in colour?
- Red light has the longest wavelength among the visible spectrum of light.
- Longer wavelengths like red are less affected by scattering compared to shorter wavelengths like blue or green.
- This means that red light is least scattered by fog or smoke, allowing it to travel further and remain visible even in poor visibility conditions.
Choice of red for danger signals:
- Due to the property of red light being the least scattered by fog or smoke, it is an ideal choice for danger signals.
- Red signals can penetrate through fog or smoke better than other colours, making them more visible in hazardous conditions.
- Using red for danger signals helps in alerting individuals to potential dangers even in situations with reduced visibility.
In conclusion, the reason why danger signals are red in colour is that red light is the least scattered by fog or smoke, making it more effective in signaling potential hazards.
Scattering of light by fog or smoke:
- When light passes through a medium like fog or smoke, it interacts with the particles present in the medium.
- The process of scattering causes the light to change its direction, making it appear hazy or diffused.
Why are danger signals red in colour?
- Red light has the longest wavelength among the visible spectrum of light.
- Longer wavelengths like red are less affected by scattering compared to shorter wavelengths like blue or green.
- This means that red light is least scattered by fog or smoke, allowing it to travel further and remain visible even in poor visibility conditions.
Choice of red for danger signals:
- Due to the property of red light being the least scattered by fog or smoke, it is an ideal choice for danger signals.
- Red signals can penetrate through fog or smoke better than other colours, making them more visible in hazardous conditions.
- Using red for danger signals helps in alerting individuals to potential dangers even in situations with reduced visibility.
In conclusion, the reason why danger signals are red in colour is that red light is the least scattered by fog or smoke, making it more effective in signaling potential hazards.
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