How fast do photons travel?
Photons, our word for the properties of light that make it seem particle-like, are massless and travel about 186,000 miles per hour in a vacuum.
What happens to photons if you just click a flashlight on and off once do photons decay or travel indefinitely?
Possibly. Photons have no age because they travel so fast. It is believed that a few certain subatomic particles (called neutrinos) can go faster than Photons, therefore they can go back in time. There are a couple websites you can look at that are all about neutrinos. Google neutrinos, and you will get many, many results.
The light leaving a flashlight when it is turned on and then off will tend to move in a straight line. The problem is that there is air that the light will have to move through. The air will scatter or even absorb the photons. Eventually all the photons will be scattered and absorbed. If the experiment was conducted in outer space, the photons would travel a great distance as there is little in the…
The expansion of space in all parts of our Universe. When a group of photons leave an object (like a super-nova in a distant galaxy), they have a certain wavelength, and a certain distance between the first photons from that super-nova and the last such photons. During their travel, the expansion of space causes the wavelength of the photons to increase (even if they interact with no matter whatsover in their travels), as well as…
UV rays are a part of the electromagnetic spectrum, which includes light, radio, x-ray, infrared, and other "waves". All of these travel through space as photons. Photons behave both as particles and as waves. Their particle nature lets them travel through space, where there is nothing to conduct them, as a wave would normally need.
The sun derives its energy from nuclear fusion reactions that transform, in its nucleus, hydrogen into helium. The photons are released from the sun's core because of these reactions. It takes from 10 000 to 170 000 years for the photons to reach the sun's surface. Some of these photons are in form of light. Some photons releases thermal radiation. It takes eight minutes to light to travel from the sun to the Earth.