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Chapter 18

Whole Unit

QuestionAnswer
electromagnetic waves changing electric/magnetic transverse waves, produced when an electric charge vibrates or accelerates
electric field a region of space that exerts electrical forces on charged particles/it is produced by electrically charged particles and changing magnetic fields
magnetic field a region of space that produces magnetic forces by changing electric fields and vibrating charges
electromagnetic radiation the transfer of energy by electromagnetic waves travelling through matter or across space
Michaelson's contribution the ability to calculate the speed of light
3x10^8 speed of light in a vacuum. all electromagnetic waves, including light, travel at this same speed
How electromagnetic waves differ from one another? wavelength/frequency
How do electromagnetic waves behave? like a wave AND a particle
photoelectric effect the emission of electrons from a metal caused by light striking the metal
photons carriers of electromagnetic energy
electromagnetic spectrum full range of frequencies of electromagnetic radiation, characterized by wavelength and frequency
polarize only allows light vibrating in one direction/gets rid of glare
transparent transmits light, Ex. windows
translucent scatters light, Ex. paper, windows at dance
opaque absorbs or reflects all of the light that strikes it, no light goes through, Ex. wood table
How light behaves when entering a new medium the light can be reflected, absorbed, or transmitted. when transmitted it can be refracted, polarized, or scattered
image copy of an objected formed by reflected/refracted waves of light
regular reflection when parallel light waves strike a smoothed, polished surface and reflect back in the same direction. Ex. a mirror or still body of water
diffuse reflection when parallel light waves strike a rough, uneven surface and reflects back in many different directions Ex. paper
dispersion when white light separates into colors, Ex. rainbow
determines the color of an object material and color of light that strikes the object
primary colors can be combined in different amounts to create ALL possible colors/red, green, blue
secondary colors combo of primary colors/cyan, yellow, magenta
complementary colors any 2 colors that form white light/blue and yellow, red and cyan, green and magenta
Created by: mgorcz on 2011-06-08



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