Solar radiation is the
radiant energy
emitted from the sun. Therefore: Irradiance refers to the amount of solar radiation received per unit area by a given surface, expressed in kW/ m2. Insolation refers to the quantity of solar radiation energy received on a surface during an amount of time, expressed in kWh/ m2.
Is insolation INcoming solar radiation?
The solar radiation that reaches the Earth is known as insolation. Insolation is a
contraction
of three words: INcoming SOLar radiation. Although sunlight contains a wide spectrum of wavelengths from heat rays to X-rays, solar radiation is mostly in the form of visible light.
How is radiation different from insolation?
Insolation is measured by the amount of solar energy received per square centimetre per minute
. Terrestrial radiation is measured using the Precision Infrared Radiometer. Insolation which is received on the earth’s surface is not uniform . It is maximum in the tropical regions and minimum towards the poles.
What is the same as solar radiation?
The
amount of radiant energy emitted by the sun
is called solar radiation, While solar irradiation refers to the amount of solar radiation received from the Sun per unit area which is expressed in (kW/ m2).
Which gas prevents radiation of heat from the earth?
Ozone
, a form of oxygen with three atoms per molecule, is concentrated in the stratosphere. Ozone absorbs most of the ultraviolet (UV) radiation coming from the sun, preventing this radiation from reaching Earth’s surface.
What controls how much radiation the sun emits?
Q1: What controls how much radiation the Sun emits? Sunspots are not the primary control. The distance from the Sun to the Earth is approximately 150 million kilometers; at this distance, Earth intercepts a tiny amount of the radiation emitted by the Sun. The law that explains this is known as the
Inverse Square Law
.
At what angle of insolation is strongest?
The intensity of insolation is greatest on the equator. This is because the angle. of the sun is higher, at
close to 90
.
What absorbs the most solar radiation?
The Earth
absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth’s surface while around 30% is reflected back to space and does not heat the surface.
How much solar radiation actually reaches the Earth?
How much light actually reaches the Earth’s surface? Only
56% of the solar
radiation that reaches the atmosphere makes it through to earths surface. The sun’s radiation must make it through multiple barriers before it reaches Earth’s surface. The first barrier is the atmosphere.
What are 4 types of radiation from the Sun?
Now, let’s look at the different kinds of radiation. There are four major types of radiation:
alpha, beta, neutrons, and electromagnetic waves such as gamma rays
.
Is there solar radiation at night?
At night,
no appreciable solar radiation is received
(on the dark side), so there is no appreciable reflection of short-wave radiation. At night the losses through long wave radiation are much the same as during the day.
What are the two basic ways to measure solar radiation?
What are the two basic ways to measure solar radiation? Explanation: Thee two basic ways to measure solar radiation are via
ground-based instruments and satellite measurements
. Anemometer is an instrument used to measure wind speed.
Which is used to prevent radiation of heat?
The vacuum between the glass walls
prevents heat loss by preventing radiation. Hint: A vacuum flask or thermos flask is designed so that it will not allow heat loss by any means of conduction or radiation. The vacuum prevents the heat loss by conduction because vacuum is a bad conductor of heat.
What gases is Earth’s atmosphere made of?
Earth’s atmosphere is composed of about
78 percent nitrogen, 21 percent oxygen, 0.9 percent argon
, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.
What is the hottest layer of the atmosphere?
The thermosphere
is often considered the “hot layer” because it contains the warmest temperatures in the atmosphere. Temperature increases with height until the estimated top of the thermosphere at 500 km. Temperatures can reach as high as 2000 K or 1727 oC in this layer (Wallace and Hobbs 24).
What happens to solar energy if only 50% penetrates Earth’s atmosphere?
Roughly 30 percent of the total solar energy that strikes the Earth is reflected back into space by clouds, atmospheric aerosols, snow, ice, desert sand, rooftops, and even ocean surf. … The remaining 46 to 50 percent of predominately visible light penetrates the atmosphere and is taken in by
the land and the oceans
.
