It is the sun.
It's a unit of energy, not light or weight.
The unit for measuring the rate at which light energy is radiated from a source is the lumen. The lumen is symbolized as lm.
The SI unit for ANY type of energy is the joule.
The units of energy that light consists of is known as photons.
The main source of light is the sun
The lumen is the unit used to measure the rate at which light energy is radiated from a source. The lumen represents the international standard unit of luminous flux that is based on the candela.
The main source of light is the sun
The quantum of light energy is called a photon. It is the smallest possible discrete unit of light.
The intensity of light is measured in lumens. The amount of energy in light can be measured in any unit of energy (BTU, calories, Joules, etc.) The energy per unit time can be measured in any unit of power (Watts, horsepower etc.) All of these are independent of specific classes of coordinate systems and hence "scalar".
Light energy is obtained by sun. This energy is converted into chemical energy.
Light energy is measured in units called photons. Photons are the smallest unit of light and are quantized particles that exhibit both wave-like and particle-like properties.
photosynthesis