gtag('propertyId', '337531981');
7680 x 4320

7680 x 4320

Light exerts physical pressure on objects in its path, a phenomenon which can be deduced by Maxwell's equations, but can be more easily explained by the particle nature of light: photons strike and transfer their momentum. Light pressure is equal to the p

24 de Enero de 2018 14:04 PM EST
1280 x 720

1280 x 720

There are many sources of light. A body at a given temperature emits a characteristic spectrum of black-body radiation. A simple thermal source is sunlight, the radiation emitted by the chromosphere of the Sun at around 6,000 kelvins (5,730 degrees Celsiu

24 de Enero de 2018 14:00 PM EST
640 x 360

640 x 360

In the fifth century BC, Empedocles postulated that everything was composed of four elements; fire, air, earth and water. He believed that Aphrodite made the human eye out of the four elements and that she lit the fire in the eye which shone out from the

24 de Enero de 2018 14:08 PM EST

7680 x 4320

Miércoles, 24 de Enero de 2018 14:04 PM EST

1280 x 720

Miércoles, 24 de Enero de 2018 14:00 PM EST

640 x 360

Miércoles, 24 de Enero de 2018 14:08 PM EST