Question | Answer |
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 |