AST 101 Lecture Notes - Lecture 6: Windows Xp Visual Styles, Emission Spectrum, Continuous Spectrum
Document Summary
Everything we see is due to the interaction between light and matter. The warmth of sunlight tells us that light is a form of energy. Measure flow of energy in light in units of watts: 1 watt = 1 joule/sec. Reflection directions (because it is not flat) Separating colors of light helps identify it. Rain drops reflect light and refract it to make different colors. Mirror reflects light directly while things like movie screens scatters light in many different. Sunlight illuminates everything with all colors, certain objects only reflect certain colors. Interactions between light and matter determine how we see things. The color black absorbs more waves of light. Light can act as a wave or as a particle. Pattern of motion that carries energy but not matter. Each photon has a wavelength and a frequency. The energy of a photon depends on frequency. C= 3. 00 x 10^18 m/s (speed of light) H= 6. 626 x 10 ^/34 j/s (planck constant)