EESA01H3 Lecture Notes - Lecture 4: Shortwave Radiation, Electromagnetic Radiation, Shortwave Radio
29 Dec 2019
School
Department
Course
Professor
Document Summary
If a warm substance becomes cooler, it is because energy is leaving the substance. In a steady-state earth, incoming energy will equal outgoing energy over a year. Insolation is energy received from the sun (incoming solar radiation). Insolation is shortwave radiation: shortwave radiation inputs include, ultraviolet light (uv, visible light, near-infrared wavelengths. Insolation and earth"s tilt and rotation produce the daily, seasonal, and annual patterns of day length and climate. Understanding electromagnetic radiation: wavelength: electromagnetic radiation travels in waves ; the distance between wave peaks is wavelength. Why is insolation shortwave radiation: wien"s displacement law: wavelength at which maximum energy radiation occurs is inversely related to surface temperature. Electromagnetic spectrum: max of sun (6000 k); of earth (290 k)? (absolute zero = 0 k; 0 c = 273. 15 k) Energy flux: the rate (amount per time) of energy (joules) received at a surface is called power (j/s).
