2015 was declared the International Year of Light by UNESCO in honor of two significant anniversaries. In 1015, the first works of Ibn al-Haytham were published, who is considered the founder of optics, and 900 years later, Albert Einstein gave the world the theory of relativity.
During the year in many countries there should be exhibitions devoted to the science of light, where the latest achievements in the field of renewable energy sources, medicine, communications, astronomy will be shown. Light images visible and invisible to the human eye have already been presented at the UNESCO international exhibition.
For example, this is how crystals of cooled medicine and sodium citrate look like, taken with a camera connected to a microscope:
And this is the laser that astronomers use to measure the scattering effects of the Earth's atmosphere:
Lightning strikes have always amazed the imagination of people with their unique power and whimsical flashes lasting a fraction of seconds. The magnitude of the charge that heats the ambient air up to 10, 000 degrees C can reach 100 million volts:
Using a laser scanning microscope, this image of the mouse retina was taken, stained with a special fluorescent dye to show the different functions of the retinal cells:
The sun looks very unusual when captured in ultraviolet light with a high-resolution telescope:
The International Year of Light aims to encourage future scientists and researchers to make new discoveries using solar energy and light technology.