Difference between revisions of "Forest ElemPhysics Optics ThinFilms"
Jump to navigation
Jump to search
| Line 9: | Line 9: | ||
<math>n \equiv \frac{c}{v}</math> | <math>n \equiv \frac{c}{v}</math> | ||
| − | <math>\frac{\lambda_0} {\lambda} = \frac{v_o/f}{v/f} = \frac{n}{n_0} = n : n_0 =1 </math>if air | + | <math>\frac{\lambda_0} {\lambda} = \frac{v_o/f}{v/f} = \frac{c/n_0}{c/n} = \frac{n}{n_0} = n : n_0 =1 </math>if air |
Revision as of 05:00, 20 April 2009
Prperties of Refection and Refraction
1.) Waves reflect from higher index of refraction materials will have a half wave shift.
2.) Frequency of light stays the same no matter what the medium change
3.) The wavelength of light changes with the index of refraction.
if air
Thin Film Applet
http://physics.bu.edu/~duffy/semester2/c26_thinfilm.html
Thin Film of MgF2 on glass
1.)
This means that reflection on all the interfaces will have a half wavelength phase shift because wave is reflected from a higher index of refraction both times.
2.) The wavelength shortens each time.