human nature to try to explain the laws according to which the living world around us.At the dawn of consciousness is observed natural phenomena attributed to a whole host of different gods, rain, thunder, lightning, wind - all of them owe their origin is the Divine.Then mystique has given way to science.While she was still in its infancy, however, it has made it possible to explain the inquisitive minds of the natural phenomena without resorting to the gods.Of particular interest is visible light.In his attempts to somehow explain, it has been suggested, according to which it is a continuous flow of some of the smallest particles-corpuscles.He adhered to this model, and it is actively defended Newton.And if there is a particle, then it should in any way be characterized.
Everyone knows that if we substitute the hand under the rays of the sun, it felt warm.It is known that this is possible due to the radiation.But exactly how the radiation carries heat?So the photon energy was opened - first indirect method.The particle itself is called "quantum of light".The photon energy is widely used in modern technology: for example, that it triggers the automatic door opening in major retail outlets.
impossible possible
So a photon - a particle of light, the quantum of energy.However, further studies are made to doubt the accuracy of the corpuscular model.First, some unusual properties have Huygens, and then Jung your experiences with a few gaps discovered the phenomenon of interference and on its basis ... brilliantly proved the wave nature of light.It would seem - it is possible to put an end, however, everything was much more complicated.Hard to believe, but the photon shows the properties of both particles and waves, and at the same time.The result of any experiment depends on the expectations of the researcher.Thoughts and intentions somehow transformed into a particle and a wave back.The energy of the photon thus remains unchanged and can be calculated in the framework of classical electromagnetic theory.
term "speed of light" is directly linked to photons.Actually, 300 thousand. Km / s - is the speed with which the non-moving mass of the particle.Their existence is inseparable from the movement: even at its origin photons move, forming a beam.
photon energy
energy, speed and mass of interconnected Einstein's famous formula E = mc2.Complementing its Planck's constant, we obtain:
E = h * v,
where v - the wavelength of light (photon frequency);h - Planck's constant.
arranged both equations, it is possible to calculate the mass of:
m = (h * v) / c2
repeat that because this particle exists only in movement, then the resulting value is applicable to such a state.
It is clear that with increasing wavelength (growth rate) becomes larger and energy.However, the human eye is capable of trapping photons with relatively low own energy.This is because the value of Planck's constant, which is represented by a number in the -34 degree, which gives very low energy.For example, the most intense color - green.But even his energy is 4 * 10 to the -19 joules.
Afterword
transition from classical mechanics to modern quantum, in which virtually all the processes of the microcosm can be explained in the framework of the relevant models continued until the 1900s.One part of the corpuscular theory of physics holds that Einstein and others - wave model of light, proposed by Maxwell.Finally, the modern idea of a photon established after the experiment with its scattering of electrons (as the latter is out of the atom, then it does not apply the concept of energy membranes).
