1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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: Light waves

  1. Oct 20, 2007 #1
    Problem: red light of wavelength 560nm is passed from air into glass where its velocity is 1.96 x 10^8 m/s.
    Find the frequency of the light in air and the wavelength of the light in glass.

    Can someone please tell me what c is and what formulas i need to use.
  2. jcsd
  3. Oct 20, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    c is the symbol for the speed of light in a vacuum.

    Have you met the concept of refraction?
  4. Nov 15, 2007 #3
    Is this how u could calculate the velocity?
    (3x10^8/1.52) = 197368421.1 m/s
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook