If the sun's rays hit the Earth's surface at a direct spot, which is usually around the equator, that area would be the warmest. Any area that is far away from the sun's rays is usually cold.
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If the sun's rays hit the Earth's surface at a direct spot, which is usually around the equator, that area would be the warmest. Any area that is far away from the sun's rays is usually cold.
The amount of energy reaching a given area from a source of radiant energy is dependent on the angle of incidence of the energy. Radiation that contacts a surface at an angle of 60° from the normal has half as much energy per unit of surface area as radiation that is parallel to the normal, radiation that reaches the surface at 70.53° from the normal has one third the energy per unit of area, radiation at 75.52° from the normal has one fourth as much energy, and so on. Therefore, if light is contacting a surface that absorbs some of it and converts it to heat, the angle of incidence of the light will affect the temperature. Such is the reason why winters are colder than summers.
LEss than a 45 degree angle
How does the angle of light affect the temperature of a surface?
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Usually, as the angle of incidence of the sun's rays decrease (i.e. when the sun is nearer to the horizon than to the zenith) the temperature decreases.
If the sun's rays hit the Earth's surface at a direct spot, which is usually around the equator, that area would be the warmest. Any area that is far away from the sun's rays is usually cold.
Sunbeams do NOT strike the Earth's surface at the same angle. Like dusk some places have an angular strike during the winter months. This is the main reason we have seasons.
When it decreases the showdows get smaller and fade but when the angle increases the shadow gets bigger.
The amount of energy reaching a given area from a source of radiant energy is dependent on the angle of incidence of the energy. Radiation that contacts a surface at an angle of 60° from the normal has half as much energy per unit of surface area as radiation that is parallel to the normal, radiation that reaches the surface at 70.53° from the normal has one third the energy per unit of area, radiation at 75.52° from the normal has one fourth as much energy, and so on. Therefore, if light is contacting a surface that absorbs some of it and converts it to heat, the angle of incidence of the light will affect the temperature. Such is the reason why winters are colder than summers.
LEss than a 45 degree angle
The seasonal tilting of the Earth away from the Sun, causes the sunlight to strike the Earth at an angle that means the distance travelled is longer and cooling is increased. This means that Winter occurs in the Northern Hemisphere, and Summer in the Southern Hemisphere, and visa versa when the Earth tilts towards the Sun.