What is solar constant of the Earth?
approximately 1370 watts per square metre
The power of the Sun at the Earth, per square metre is called the solar constant and is approximately 1370 watts per square metre (W/m2). The solar constant actually varies by +/-3\% because of the Earth’s slightly elliptical orbit around the Sun.
What is the solar constant and why is it not constant?
The solar “constant” is not a physical constant in the modern CODATA scientific sense; that is, it is not like the Planck constant or the speed of light which are absolutely constant in physics. The solar constant is an average of a varying value. In the past 400 years it has varied less than 0.2 percent.
Why is solar constant important?
Knowledge of the exact value of the solar constant is very important for the study of heat-exchange processes in the earth’s atmosphere and for the investigation of processes occurring in the sun. This method permits the absorption and scattering of sunlight by the earth’s atmosphere to be taken into account.
What is solar constant Slideshare?
The rate at which solar energy arrives at the top of the atmosphere is called the SOLAR CONSTANT, The distance between the sun and earth varies through out the year.
What is solar constant class 10th?
The solar constant is the measurement of the total radiation from the sun per unit of time per unit of area. The estimated value of the solar constant is around 1.36 kilowatts per square meter. Therefore its unit is Watt per square meter.
What is the solar constant quizlet?
The solar constant is the amount of energy received at the top of the Earth’s atmosphere on a surface oriented perpendicular to the Sun’s rays (at the mean distance of the Earth from the Sun).
What is solar constant what is its value Class 10?
Why is solar constant divided 4?
We divide by 4 since the solar energy is spread over the surface of the planetary sphere. The Earth intercepts a circular area of incoming sunlight, and this area is spread over a sphere with the same radius as the circle (area of circle / area of sphere of same radius = 0.25).
What does the solar constant of a planet depend on?
At any given moment, the amount of solar radiation received at a location on the Earth’s surface depends on the state of the atmosphere, the location’s latitude, and the time of day.
What is the solar constant where is it measured quizlet?
What is the solar constant? Where is it measured? The solar constant is a measure of the rate of solar radiant energy received by the earth at the top of the atmosphere.. Make a sketch that shows what happens to the sun’s radiant energy as it passes through the earth’s atmosphere to the earth’s surface.
What is the value of solar constant in W m2 *?
approximately 1380 watts per square meter
Above the earth’s atmosphere, solar radiation has an intensity of approximately 1380 watts per square meter (W/m2). This value is known as the Solar Constant. At our latitude, the value at the surface is approximately 1000 W/m2 on a clear day at solar noon in the summer months.
How do you calculate solar constant?
The solar constant is calculated by multiplying the sun’s surface irradiance by the square of the radius of the sun over the average distance between the Earth and the sun.
What does the solar constant tell us?
The solar constant (GSC) is a flux density measuring mean solar electromagnetic radiation (solar irradiance) per unit area. It is measured on a surface perpendicular to the rays, one astronomical unit (AU) from the Sun (roughly the distance from the Sun to the Earth).
What does solar constant mean?
Solar constant. The solar constant, a measure of flux density, is the amount of incoming solar electromagnetic radiation per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit.
What is the reason for solar energy?
Solar energy is the power provided by the sun, harnessed through technology called photovoltaic (PV) cells, which turn sunlight directly into electricity. For a layman’s description of the “photovoltaic effect,” when sunshine hits the PV cell, the photons of light excite the electrons in the cell, causing them to flow and generate electricity.