Home
Class 10
PHYSICS
Why is the colour red used as a sign of ...

Why is the colour red used as a sign of danger ?

Text Solution

Verified by Experts

Red colour is used as a sign of danger due to its longest wavelength and lesser deviation (scattering). Therefore, it can reach to a longer distance.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The colour of red snow is due to

Why are halogens coloured?

Assertion : Aqueous gold colloidal sol is red in colour. Reason : The colour arised due to scattering of light by particles of gold.

Assertion: A quious gold colloidal solution is red in colour. Reason: The colour arises due to scattering of light by colloidal gold particles.

The tolerance level of a resistor with the colour code red, blue, orange, gold is

The colour of the red blood cells is due to

(i) Why is colour blindness more prominent in males than females? (ii) Why is Drosophila used extensively for genetic studies?

STATEMENT-1: In the acid-base titration involving strong base and weak acid, methyl red can be used as an indicator. STATEMENT-2: Methyl red changes its colour in the pH range 4.2 to 6.3.

Which one is bright red coloured ?

The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

ICSE-SAMPLE PAPER 2014-SECTION-II
  1. Why is the colour red used as a sign of danger ?

    Text Solution

    |

  2. A man having a box on his head, climbs up a slope and another man havi...

    Text Solution

    |

  3. The forces each of magnitude 10N act vertically upwards and downwards ...

    Text Solution

    |

  4. A body is thrown vertically upwards. Its velocity keeps on decreasing....

    Text Solution

    |

  5. Draw a diagram to show how a single pulley can be used so as to have i...

    Text Solution

    |

  6. Derive a relationship between mechanical advantage, velocity ratio and...

    Text Solution

    |

  7. Light passes through a rectangular glass slab and through a triangular...

    Text Solution

    |

  8. Ranbir claims to have obtained an image twice the size of the object w...

    Text Solution

    |

  9. A lens forms an erect, magnified and virtual image of an object. Nam...

    Text Solution

    |

  10. A lens forms an erect, magnified and virtual image of an object. Dra...

    Text Solution

    |

  11. Define the power of a lens.

    Text Solution

    |

  12. The lens mentioned in 6 (b) above is of focal length 25 cm. Calculate ...

    Text Solution

    |

  13. The adjacent diagram shows three different modes of vibrations P, Q an...

    Text Solution

    |

  14. The adjacent diagram shows three different modes of vibrations P, Q an...

    Text Solution

    |

  15. The adjacent diagram shows three different modes of vibrations P, Q an...

    Text Solution

    |

  16. A type of electromagnetic wave has wavelength 50 Å. Name the wave.

    Text Solution

    |

  17. A type of electromagnetic wave has wavelength 50 Å. What is the spee...

    Text Solution

    |

  18. A type of electromagnetic wave has wavelength 50 Å. State one use of...

    Text Solution

    |

  19. State one important property of waves used for echo depth sounding.

    Text Solution

    |

  20. A radar sends a signal to an aircraft at a distance of 30 km away and ...

    Text Solution

    |

  21. Two resistors of 4Omegaand6Omega are connected in parallel to a cell t...

    Text Solution

    |