The sun is powered by what?
Sunspots show an average cycle of?
Electromagnetic radiation travels through the speed of light which is?
299,792,458 meters per second
-he distance between successive peaks or nodes of a wave
-Intensely related to frequency
-The number of waves passing a fixed point in one second
-Intensely relaed to wavelength
Every object with a temperature above -273.12C (-459F) emits electromagnetic waves.
The amount of energy emitted by an object is proportional on the object's temperature (Stefan Boltzman Law)
6,000 degrees C (11,000 degrees F)
15 degrees C (59 degrees F)
Concentrated insolation due to the earth's curvature
The point on the earth at which the sun is directly overhead
Greater surface heating is due to:
-Reduced radiational beam spreading -the energy is concentrated on a smaller area
-A shorter pathway of the sun's rays through the atmosphere which causes less radiation attenuation of the rays on their way through the atmosphere
-Revolution of the earth around the sun
-Rotation of the earth around its own axis
-Tilt of the earth's axis
the Tropic of Cancer (23.5 N latititude)
-The sun doesn not sink below the horizon (24 hrs of night)
-All locations north of 66.5 degrees N
-The sun does not rise above the horizon (24 hrs of night)
-All locations south of 66.5 degrees S
-The event or day when the sun is directly above the equator
-Aequus (equal) and nox (night)
-Refers to the fact that all locations on the planet experience nights which are 12 hours long on this day.
-Twice a year
-Around March 20 and September 23
-Angle between the rays of the sun and the plane of the earth's equator or the distance between the subsolar point from the equator degree.
-Approximately 23.5 degrees during summer solsice, -23.5 degrees during winter solstice, and 0 degrees during the equinoxes