AS101 Study Guide - Final Guide: Light Curve, Runaway Greenhouse Effect, Subduction
Document Summary
The warmth of sunlight tells us that light is a form of energy: radiative energy: we can measure the flow of energy in lightin units of watts: 1 watt = 1 joule/s. Wavelength is the distance between two wave peaks. Frequency is the number of times per second that a wave vibrates up and down wave speed = wavelength x frequency. = wavelength , f = frequency c = 3. 00 x 108 m/s = speed of light. E = h x f = photon energy h = 6. 626 x 10-34 joule x s = planck"s constant. Emission: energy in matter can be converted into light that is emitted. Absorption: matter can absorb energy in the form of light and convert it to another form or re-emit it. Transmission: transparent objects transmit light, opaque objects block (absorb) light. Reflection or scattering: light can bounce off objects inone direction (reflection) or random directions (scattering)
