Search results
Results From The WOW.Com Content Network
The higher energy (shortest wavelength) ranges of UV (called "vacuum UV") are absorbed by nitrogen and, at longer wavelengths, by simple diatomic oxygen in the air. Most of the UV in the mid-range of energy is blocked by the ozone layer, which absorbs strongly in the important 200–315 nm range, the lower energy part of which is too long for ...
Outgoing longwave radiation (OLR) is the longwave radiation emitted to space from the top of Earth's atmosphere. [1]: 2241 It may also be referred to as emitted terrestrial radiation. Outgoing longwave radiation plays an important role in planetary cooling. Longwave radiation generally spans wavelengths ranging from 3–100 micrometres (μm).
Natural sources produce EM radiation across the spectrum. EM radiation with a wavelength between approximately 400 nm and 700 nm is directly detected by the human eye and perceived as visible light. Other wavelengths, especially nearby infrared (longer than 700 nm) and ultraviolet (shorter than 400 nm) are also sometimes referred to as light.
It’s the longest day and shortest night in the Northern Hemisphere. It’s also the first official day of summer. Our ancient ancestors certainly took note of the yearly occasion.
The longest night happens on the solstice because the hemisphere is in its furthest position from the sun. That occurs each year on Dec. 21 or 22. This year, it falls on Dec. 21 at 4:21 a.m ET ...
Winter solstice, the shortest day of the year and the official first day of winter, is on Saturday, December 21, this year (well, for the vast bulk of the world’s population anyway).
Regardless of the time of day (i.e. Earth's rotation on its axis), the North Pole will be dark, and the South Pole will be illuminated; see also arctic winter. Figure 3 shows the angle of sunlight striking Earth in the Northern and Southern Hemispheres when Earth's northern axis is tilted away from the Sun, when it is winter in the north and ...
In the northern hemisphere, the longest day of the year (summer solstice) is on or about 21 June. [14] After that date, days grow shorter (i.e. nights grow longer) until 21 December (the winter solstice). This situation is reversed in the southern hemisphere (i.e., longest day is 21 December and shortest day is 21 June). [1] [2]