Light

The frequency of a wave is 6 hz and the wavelength is 12 m. What is the speed of this wave.

 

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

 

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

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

 

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