Shade

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Shade

Shade is the blocking of sunlight

Sunlight

Sunlight, in the broad sense, is the total spectroscopy of the electromagnetic radiation given off by the Sun. On Earth, sunlight is Filter ed through the Earth's atmosphere, and the solar radiation is obvious as daylight when the Sun is above the horizon....
(in particular direct sunshine) by any object, and also the shadow

Shadow

File:Shadow, Ronald Reagan Building - Washington, D.C..jpgA shadow is an area where direct light from a light source cannot reach due to obstruction by an object....
created by that object. Shade also consists of the colors grey, black,white, etc. It may refer to blocking of sunlight by a roof, a tree

TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
, an umbrella

Umbrella

An umbrella or parasol is a canopy designed to protect against precipitation or sunlight. The term parasol usually refers to an item designed to protect from the sun, and umbrella refers to a device more suited to protect from rain....
, a window shade or blind

Window blind

A window blind is a specific type of window covering which is made with slats of fabric, wood or metal held in place with strings or fabric strips called tapes, if horizontal or metal or plastic tracks with carriers if vertical....
, curtains, or other objects.

Shade is an important issue in temperate

Temperate

In geography, temperate or tepid latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold....
and tropical zones for providing cooling and shelter from the sun

Sun

The Sun , a G V star, is the star at the center of the Solar System. The Earth and other matter orbit the Sun, which by itself accounts for about 98.6% of the Solar System's mass....
. Providing certain configurations of shading is an important passive solar

Passive solar

Passive solar technologies are means of using solar energy for useful energy without use of active mechanical systems . Such technologies convert sunlight into usable heat , cause air-movement for ventilating, or future use, with little use of other energy sources....
technique.

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Encyclopedia

Shade is the blocking of sunlight

Sunlight

Shadow

TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
, an umbrella

Umbrella

Window blind

Temperate

Sun

Passive solar

Shade tree

A shade tree is any tree grown specifically for its shade. This term usually applies to large trees with spreading canopy . Shade trees are effective in reducing the energy used in cooling homes....
s, or with vine

Vine

A vine is any plant of genus Grape or, by extension, any similar climbing or trailing plant. The word, derived from Latin vinea, referred to the grape-bearing variety....
s. Vines particularly suited for this purpose include Boston ivy, Virginia creeper

Virginia creeper

Virginia creeper may refer to:* Parthenocissus quinquefolia, plant, Virginia creeper or five-leaved ivy* Parthenocissus_vitacea, plant, False Virginia Creeper...
, and morning glory

Morning Glory

Morning Glory is a pre-Code United States drama film which tells the story of an eager but unstable would-be actress whose good looks draw more attention than her acting....
.

Shade offers relief to golfers and sportsmen of many types. Careful consideration must be taken when removing trees near tees and other clog points on a golf course routing. It has been shown that the shade from a natural tree can be several degrees cooler than that provided by artificial structures or umbrellas.

Shading using non-living materials blocks the sun, but also results in sunlight being absorbed and re-radiated as heat, or in sunlight being reflected as glare

Light pollution

Light pollution, also known as photopollution or luminous pollution, is excessive or obtrusive artificial light. The International Dark-Sky Association , "The Light Pollution Authority," defines light pollution as: It obscures the stars in the night sky for city dwellers, interferes with astronomy observatory, and, like an...
. Green plants, on the other hand, not only absorb a significant portion of the sunlight to invest as energy in photosynthesis

Photosynthesis

File:Seawifs global biosphere.jpgPhotosynthesis is a metabolic pathway that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight....
to produce sugar

Carbohydrate

Carbohydrates or saccharides are the most abundant of the four major classes of biomolecules. They fill numerous roles in living things, such as the storage and transport of energy and structural components ....
, but also actively transpire, producing an additional cooling effect.

In gardening terms, there are various types of shade:

Full sun - more than five hours of direct sun per day.
Part shade - two to five hours of direct sun, or all-day dappled sun (sunlight shining through open trees).
Full shade - less than two hours of direct sun per day.