Narrated Lesson
Resonance Review
IV. Light (electromagnetic waves)
A. Speed
1. 3 x 108 m/s = c
In air v ≈ 3 x 108 m/s
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
ŠTony Mangiacapre.,
- All Rights Reserved [Home]
|
|