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Why do people associate red with hot and blue with cold

  1. Jan 31, 2013 #1
    When in reality, blue light is the higher energy.
  2. jcsd
  3. Jan 31, 2013 #2
    Because people's intuition is more a matter of biology and sociology than it is a matter of physics.
  4. Jan 31, 2013 #3
    Fire is kind of red, ice is kind of bluish?
  5. Jan 31, 2013 #4
    Perhaps because fire, bonfires are red-yellow. Embers are red. Hot metal is red. Volcanoes lava is red...

    On the other hand. Ice is sometimes bluish. Cloudy days are of higher color temperature, this is more bluish. The sea is blue.

    The heat is infrared and we are not sensitive to light (except for the eyes). Too much visible light on our skin are turned into infrared and this is why we notice its energy.

  6. Jan 31, 2013 #5
    I see numerous examples of red being associated with hot, but there are fewer examples of blue being cold. I think it may be more along the lines of "not hot" is cold and "not red" is blue.
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