What do mean by solar constant?

solar constant, the total radiation energy received from the Sun per unit of time per unit of area on a theoretical surface perpendicular to the Sun’s rays and at Earth’s mean distance from the Sun. The “constant” is fairly constant, increasing by only 0.2 percent at the peak of each 11-year solar cycle.

What is the solar constant for Earth?

1,361 W/m2
Scientist refer to the amount of incoming energy from sunlight as “insolation”. The specific value at Earth of 1,361 W/m2 is called the “solar constant”.

Why is the 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 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 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 Upsc?

Solar constant: At the thermopause or 1000 km height from earth surfaces, the amount of energy received per square meter of areas is called solar constant. It is generally 1366 Watt or 1.366 kilowatts per square meters areas per hour. The solar constant is highest in the perihelion point of the orbit in January month.

What is the value of solar constant in calories?

The approximate average value cited, 1.3608 ± 0.0005 kW/m2, which is 81.65 kJ/m2 per minute, is equivalent to approximately 1.951 calories per minute per square centimeter, or 1.951 langleys per minute.

What is solar energy Slideshare?

Electrical generation (solar power)

• Solar power is the conversion of sunlight into electricity , either directly using photovoltaics (PV), or indirectly using concentrated solar power (CSP). CSP systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam.

What is solar constant and explain terrestrial and extraterrestrial solar radiation?

Terrestrial radiation is the term which is used to describe the infrared radiation radiated by the atmosphere. On the other hand the solar radiation which are incident outside the atmosphere is called extra Terrestrial solar radiation.