By: Derek Anderson & Alex Walker Light and Reflection By: Derek Anderson & Alex Walker

Characteristics of Light Light is made up of electromagnetic waves Speed of 299,700,000 meters per second or roughly 300,000,000 m/s

Electromagnetic Waves Electromagnetic Waves- consist of oscillating magnetic and oscillating electric fields Types of electromagnetic waves vary depending on frequency and wavelength

Types of Electromagnetic Waves

Wave Speed Equation c = f x h Speed of light = frequency x wavelength This equation is used to determine what the frequency or wavelength of a wave is when one or the other is absent.

Practice Problem The brightest light detected from a star has a frequency of about 3 x 10 Hz. What is the wavelength of this light? 9

Reflection Diffuse reflection- light reflected from a rough, textured surface reflects in many different directions Specular reflection- light reflected from a smooth, shiny surface reflects in only one direction

Reflection (cont’d) Angle of incidence- the angle between a ray that strikes a surface and the line perpendicular to that surface Angle of reflection- the angle formed by the line perpendicular and the direction in which a reflected ray moves

Concave & Convex Spherical Mirrors Concave spherical mirrors- a mirror whose reflecting surface is a segment of the inside of a sphere Convex spherical mirrors- a mirror whose reflecting surface is an outward-curved segment of a sphere

Color Spectrums Additive primary colors- red, green, blue Subtractive primary colors- cyan, yellow, magenta