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

Wavelenght, frequencies

  1. Jun 15, 2007 #1


    User Avatar

    hey how come the IR heat up materials more than UV ?
    and why people say IR go longer distances

    the way i see it :

    UV have faster frequencies, they should have more energy
    while IR have slower frequencies, should have less energy

    or is it that when hitting a electron , photons that vibrate faster transfer less energy to the electron ?


    and as for the distance , i thought photons would carry on forever
    so is it that high frenquence photons loose their energy faster ?

    and do photons see their frequencies slower as they get in contact with matter ?
  2. jcsd
  3. Jun 15, 2007 #2


    User Avatar

    Staff: Mentor

    It doesn't, unless there is a difference in how certain materials aborb different wavelengths.
    It doesn't.
    Not faster or slower, higher and lower, but yes.
    Essentially yes.
    They will carry on forever if they don't hit anything.
    That one I'm not sure about - there may be an effect like that in refraction.
  4. Jun 15, 2007 #3
    i don't think the frequency changes, the wavelength and the velocity do though
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook