Resonance Review

UC Irvine

School blocks YouTube? Download the file below.



1st, 2nd, 3rd Harmonic
 (B. Barrett)



IV. Light (electromagnetic waves)


A. Speed



1.  3 x 108 m/s = c (in vacuum)

(fastest speed in universe)

In air v ≈ 3 x 108 m/s



Did you know that
 light can travel
 about 7.5 times around the world
 in 1 second!


v = fλ


c = fλ 


3 x 108 m/s = fλ


Divide both sides by λ



f = c/λ


Frequency, Wavelength















Ex) What is the wavelength of light with a frequency of 7.69 x 1014 Hz in a vacuum?


c = fλ


3 x 108 m/s = 7.69 x 1014  Hz λ





λ = 4 x 10-7 m




2. Speed of light depends on the medium








ŠTony Mangiacapre., - All Rights Reserved [Home]
Established 1995
Use any material on this site (w/ attribution)