2007-01-12 01:17:19 · 7 answers · asked by chris v 1 in Science & Mathematics ➔ Physics
It is the energy of the photons of the light .
The energy of one photon is e= h f where f is the frequency of the light , h constant of Planck = 6.63 10^-34 Js and E = energy.
To have the total energy , you mist multiply this value by the number of photons
2007-01-12 01:24:20 · answer #1 · answered by maussy 7 · 0⤊ 0⤋
Light, form of energy visible to the human eye that is radiated by moving charged particles. Light from the sun provides the energy needed for plant growth and plants convert the energy in sunlight into storable chemical form through a process called photosynthesis. Petroleum, coal, and natural gas are the remains of plants that lived millions of years ago, and the energy these fuels release when they burn is the chemical energy converted from sunlight. When animals digest the plants and animals they eat, they also release energy stored by photosynthesis.
Scientists have learned through experimentation that light behaves like a particle at times, and like a wave at other times. The particlelike features are called photons. Photons are different from particles of matter in that they have no mass and always move at the constant speed of 300,000 km/sec (186,000 mi/sec). When light diffracts, or bends slightly as it passes around a corner, it shows wavelike behavior. The waves associated with light are called electromagnetic waves because they consist of changing electric and magnetic fields.
2007-01-12 03:18:53 · answer #2 · answered by veerabhadrasarma m 7 · 0⤊ 0⤋
It is the radiant energy of emission of a body at a given temperature and wavelength. It is expressed by the Planck radiation law. The units of energy carried by the emitted radiation (visible, infrared, radio, microwave, etc) is cal cm^-2 min^-1 micron^-1.
As the temperature of a radiating body (like the Sun) increases, the wavelength of maximum emission decreases and the total energy of the radiating body increases.
2007-01-12 03:00:19 · answer #3 · answered by 1ofSelby's 6 · 0⤊ 0⤋
you got the answer in the question! light is a form of energy traveling
at the speed of 30000000 meters/ second .It is made of particles called photons, still,it has wave characteristics(duality of matter and
radiation).
2007-01-12 01:28:28 · answer #4 · answered by IN PURSUIT OF WISDOM 2 · 0⤊ 0⤋
energy u receive from the sun
2007-01-12 01:25:46 · answer #5 · answered by Achintya s 2 · 0⤊ 0⤋
Photons.
2007-01-12 02:52:27 · answer #6 · answered by THE UNKNOWN 5 · 0⤊ 0⤋
We know little about the whats but much about the hows
2007-01-12 01:24:44 · answer #7 · answered by walter_b_marvin 5 · 0⤊ 0⤋