Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The light in my oven

  1. Jul 27, 2005 #1

    amt

    User Avatar

    So, I was baking this Indian delicacy I got at the local Indian grocery store commonly known as 'samosas'. I switched the light inside the oven to observe the progress and then suddenly this thought occured to me. What happens to light when it gets heated up?

    What does photons do under extremem heat?
    What happens to the photons when they leave the Sun and travel further and further away?

    As for the samosas they came out great! :tongue:
     
  2. jcsd
  3. Jul 27, 2005 #2

    Pengwuino

    User Avatar
    Gold Member

    Unless im mistaken, photons dont really "heat up". Only atoms have temperatures so you cant heat up photons.
     
  4. Jul 27, 2005 #3

    russ_watters

    User Avatar

    Staff: Mentor

    Photons are heat(edit: I may get hit for being too simplistic there...), so the question is redundant. Anyway, the photons from the light in the oven are much, much hotter (higher energy) than the temperature of the oven itself.
     
    Last edited: Jul 27, 2005
  5. Jul 27, 2005 #4

    Pengwuino

    User Avatar
    Gold Member

    Guess im mistaken!
     
  6. Jul 28, 2005 #5

    Mk

    User Avatar

    Thermal energy (heat) is kinetic energy from disorderly motions and vibrations of little particles. It has to be mass that is doing the shaking. Photons, the light particles, have no mass, so we can't call them hot or not.
     
  7. Jul 28, 2005 #6

    amt

    User Avatar

    How about Planks constant and black body radiation? Don't they mean heat from light that is proportional to the frequency?


    This light thing looks stranger and stranger the more and more I learn about it. I was thinking about the ramifications of photons being effected by heat if that was true. Life would not be possible in that case. Seems like it was deliberately designed for us...strange..... :uhh:
     
  8. Jul 28, 2005 #7

    brewnog

    User Avatar
    Science Advisor
    Gold Member

    Ant, do you realise that photons (of a certain frequency) ARE a form of heat? I'm not certain whether you'd picked that up from russ's post.
     
  9. Jul 29, 2005 #8

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Photons are basically packets of energy. The energy is of course, proportional to the frequency of the photon. Heat is a form of energy. Heat energy that is radiated - either from the sun, or some other ideal black-body, or even a non-ideal radiator like the one in your oven - is carried by photons (of all frequencies - some frequencies more than others). So, it is meaningless to talk of photons getting heated up. That's like asking if electrons can get charged by static. (electrons carry charge; photons carry heat).

    'Light' is just a specific name assigned to photons of a particular frequency/wavelength range - the range that is "visible" to the human eye.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: The light in my oven
  1. Light and my speed (Replies: 14)

  2. My thoughts on light (Replies: 10)

Loading...