Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
Electromagnetic radiation |
Energy propagated by electric and magnetic fields that increase and decrease in intensity as they move, wavelike, through space |
|
|
Frequency |
The number of complete waves, or cycles, that pass a given point per second |
|
|
Wavelength |
The distance between any point on a wave and the corresponding point on the next crest (or trough) of the wave, that is, the distance the wave travels during one cycle |
|
|
Amplitude |
The height of the crest (or depth of the trough) |
|
|
Electromagnetic spectrum |
A continuum of radiant energy typically arranged in adjacent regions by increasing wavelength (nm) |
|
|
Ultraviolet (UV) radiation |
Radiation of the region adjacent to visible light on the short-wavelength end of the spectrum |
|
|
Infrared (IR) radiation |
Radiation of the region adjacent to visible light on the long-wavelength end of the spectrum |
|
|
Refraction |
The change in speed of a wave and subsequent change in direction that occurs when it strikes the boundary between media at an angle other than 90' |
|
|
Diffraction |
The phenomenon that occurs when a wave strikes the edge of an object and bends around it |
|
|
Quantum |
A packet (fixed quantity) of energy |
|
|
Planck's constant |
A constant of energy (in J) in the equation to determine the quantity of energy emitted from a hot, glowing object |
|
|
Photoelectric effect |
When monochromatic light of sufficient frequency shines on a metal plate, a current flows |
|
|
Photon |
Particulate, quantized bundle of energy |
|
|
Line spectrum |
A series of fine lines at specific frequencies separated by black spaces when light from electrically excited gaseous atoms passes through a slit and is refracted by a prism |
|
|
Stationary state |
An energy level associated with a fixed circular orbit of an electron around the nucleus |
|
|
Ground state |
The lowest energy level closest to the nucleus |
|
|
Excited state |
The state of an atom when an electron occupies any orbit farther from the nucleus than when in the ground state |
