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Physical Science
Chpt 15 vocab for final
Term | Definition |
---|---|
Incandescent | bulbs that have materials which are heated until they release visible energy |
Phosphorescence | the emission of radiation in a similar manner to fluorescence but on a longer timescale, so that emission continues after application of energy ceases |
Flourescent | bulbs that are made of mercury |
Bioluminescence | Light given off by living creatures |
Chemiluminescence | light is emitted through a chemical reaction (glowsticks) |
Spectrograph | an instrument that separates light into a frequency spectrum and records the signal using a camera |
Spectroscope | an instrument that splits light into the wavelengths that make it up |
Line Spectrum | this displays distinctly visible lines of color that can be seen at specific wavelengths aligned along a scale in a spectrograph |
Monochromatic | this emits a single color |
Speed of Light | 3.00x10^8 |
Candela | SI unit for light |
Inverse-Square Law | distance and its effect on forces are often related by this |
Law of Reflection | states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence . |
Subtractive Colors | means that the colors are reflected |
Additive Colors | means that light is being emitted |
Diffuse Reflection | rays bounce off of a rough surface in random directions |
Specular Reflection | rays bounce off of a smooth surface |
Mirrors | plane(flat), convex, and concave |
Convex | converging, curved outward, corrects farsightedness |
Concave | diverging, curved inward, corrects nearsightedness |
Plane | flat mirror |
Lenses | an object or device that focuses or otherwise modifies the direction of movement of light, sound, electrons, etc. |
Diverging | concaving; going inward |
Converging | conves; going outward |
Nearsightedness | can see up close instead of far away |
Farsightedness | can see far away but not close up |
Normal | the line perpendicular to the surface |
Incident Ray | the ray hitting the surface |
Reflecting Ray | the ray bouncing off the surface |
Angle of Incidence | the angle created with the incident ray and the normal ray |
Angle of Reflection | the angle created by the reflecting ray and the normal ray |