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

Homework Help: Calculate wavelength to frequency

  1. Feb 11, 2006 #1
    Hi i am trying to calculate what is the frequency of the 600nm that our eye can see...
    I am calculating the
    f=(c/l)
    (3*10^8)/(600*10^-9)=0.5*10^19 whics means 5phZ... Is it coreect?

    I have tried to calculate using matlab but the results dont agree
    >> (3*10^8)/(600*10-9)

    ans =

    5.0075e+004
     
  2. jcsd
  3. Feb 11, 2006 #2

    Pengwuino

    User Avatar
    Gold Member

    I think you meant 0.5Phz or 500Thz, which is correct.
     
  4. Feb 11, 2006 #3
    thx a lot

    (3*10^8)/(600*10-9)
    (3*10^8)/(6*10-7)=0.5*10^15=500Thz and u are right

    How can u understand the matlabs ouput?
    5.0075e+004
     
  5. Feb 11, 2006 #4

    Pengwuino

    User Avatar
    Gold Member

    e+004 means E04 which is basically 5.0075 * 10^4

    I think you screwed up when you entered: (3*10^8)/(600*10-9)

    The program probably did 600 * 10 * -9 or something because you didn't enter it in correctly.
     
  6. Feb 11, 2006 #5
    >> (3*10^8)/(600*10^-9)

    ans =

    5.0000e+014

    thx
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook