Unit 9 – Waves & Optics. Chapters 14-16. Electromagnetic waves is a transverse wave consisting of oscillating electric and magnetic fields at right angles to each other. 14-1 Characteristics of Light. The EM spectrum includes more than visible light.
Electromagnetic waves is a transverse wave consisting of oscillating electric and magnetic fields at right angles to each other.
c = speed of light in a vacuum (3.0 x 108 m/s)
l = wavelength (meters)
f = frequency (Hertz)
How colorblind people see the world
Reflection – 14.2 & 14.3
Flat Mirrors & Curved Mirrors
The texture of a surface affects how it reflects light.
Light reflected from a rough, textured surface is called diffuse reflection.
Light reflected from a smooth, shiny surface is called specular reflection.
Angle of incidence – the angle between the ray that strikes a surface and the normal to that surface.
Angle of reflection – angle formed by the line normal to a surface and the direction in which a reflected ray moves.
These angles are measured from the normal.
Refraction – 15.1
Refraction - light BENDS when it goes from one kind of substance to another (because of the change in average speed).
The average speedof the light wave changes due to change in media, but
THE FREQUENCY DOES NOT CHANGE!
Using v = f, we see
that the wavelength has
Different media result in different amounts of refraction.
Lenses – 15.2
Like mirrors, lenses form images, but lenses do so by refraction rather than reflection.
The two basic types of lenses are::
Ray diagrams make it possible for us to
predict what kind of images each type of