What is Solar constant and Joule’s constant?

The solar constant, a measure of flux density, is the conventional name for the mean solar electromagnetic radiation (the solar irradiance) per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit (AU) from the Sun (roughly the mean distance from the Sun to the Earth). The solar constant includes all types of solar radiation, not just the visible light. It is measured by satellite as being 1.361 kilowatts per square meter.

JOULE’s constant
Joule's constant is the relationship between kinetic energy and heat. Kinetic energy is usually expressed as force times distance (Newton-meters), which physicists call work, but it is interchangeable with kinetic energy.

The most recent value given is 4.1868 Newton-meters per calorie. Joule said it is 4.2 N-m/calorie, which means he was only off by 3 parts per thousand. Pretty good for 1845, huh. Except that only fakery produces that much perfection without real tools of science.

Now days Joule's constant is usually called "the mechanical equivalent of heat." Physicists apparently don't want to draw too much attention to what occurred in 1845. Otherwise, they just love to name their numbers after some god.

The solar constant, a measure of flux density, is the conventional name for the mean solar electromagnetic radiation (the solar irradiance) per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit (AU) from the Sun (roughly the mean distance from the Sun to the Earth).

Joule’s constant is also called the mechanical equivalent of heat. If mechanical work is done against the frictional forces, energy is released in the form of heat. The rise in temperature of water by 1 degree Celsius or 33.8 degrees Fahrenheit, due to the work done, is also described as the heat capacity of water. Joule’s equivalent is determined by measuring the work done and heat dissipated.