Light

Narrated Lesson

showmethephysics.com 

Resonance Review

UC Irvine

School blocks YouTube? Download the file below.

Hoot_Tubes.mov

Bubbles
1st, 2nd, 3rd Harmonic
 (B. Barrett)

Fill In The Blank Notes

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

Relationship?

Inverse

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

Reflection