|
Resonance Review
UC Irvine
Bubbles
IV.
A. Speed
1.
3 x 108 m/s = c (in vacuum)
(fastest speed in universe) 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 medium
B. Reflection
| Larger Version |
Reflection
1. Law of Reflection
a. θ of incidence = θ of reflection
θ of Incidence =
θ of Reflection
Use the acute angles on your protractor
Charles William Weick Elementary Mechanical Drawing,
Theory and Practice Line going through O, we will
Remember ...
What is the smallest mirror
1/2 your height
Click and drag gecko
Half the size
The image from a plane mirror:
a. Virtual (realistic) & Upright (Straight up and down)
b. Incident ray, normal line, and reflected rays are all in the same plane
Source: Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 77
c. The distance the object is in front of the mirror equals the distance the image is behind the mirror
2. Two Basic Kinds of Reflection
a. Regular Reflection – reflection off a polished surface (produces images)
Regular Reflection Produces Images
b. Diffuse Reflection – reflection off an irregular surface causing light to scatter (no image) ![]()
Ray C
60 degrees
© Tony Mangiacapre., -All Rights Reserved [Home] Established 1995 - Use any material on this site (w/ attribution) |
|||||||