What would happen to the wavelength of the Universe was expanding?

As the universe expands, those waves are still going to fill the whole thing, since no region is special. The number of wavelengths for one wrap-around won’t change, since that would mean a sudden break somewhere in the wave. So the wavelengths must get longer.

Does light lose energy as it travels the Universe?

As light travels away from a galaxy, the Universe is continually expanding, meaning that the distance the light needs to travel is continually increasing as well. As space stretches out underneath a beam of light, its wavelength increases, and its energy decreases.

Where do the longer wavelengths in the Universe come from?

As the light from the universe’s most distant galaxies travels through space, it’s stretched by the expansion of space. By the time the light reaches Earth, that stretching process has transformed short wavelengths of visible and ultraviolet light into the longer wavelengths of infrared light.

What causes wavelengths to stretch?

The further away an object is, the greater the shift. Something causes the wavelength of the radiation (emitted by faraway stars and galaxies) to ‘stretch’.

How does the redshift confirm that universe is expanding?

When the distance between the source (galaxy) and observer is increasing, the apparent frequency is decreased and wavelength is increased, i.e., there is a shifting towards red end of the spectrum. Hence, we conclude that universe is expanding.

What happens to a photon when it loses energy?

What happens to the energy lost by photons as they become red-shifted by gravity or cosmic expansion? A photon’s energy is inversely proportional to it’s wavelength. As it becomes red-shifted, it’s wavelength becomes larger so it’s energy becomes smaller.

What happens when a photon loses all its energy?

the energy and momentum of the photon is transferred to the electron and a new photon of lower energy appears. It cannot be completely absorbed because energy and momentum conservation would be violated, as the answer of @Chris says.

Which wave has the longest wavelength?

Radio waves
Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

What is the wavelength of the light of a photon?

It does not have a wavelength. It is characterized in the table as a point particle with mass zero and spin one. Its energy is given by E = h ν, where ν is the frequency of the classical electromagnetic wave which can be built up by photons of the same energy.

How many photons exist in the universe?

Those photons didn’t really exist before. There aren’t a fixed number of photons. They can be destroyed and created. The energy, momentum, and angular momentum they have were there beforehand, but not in the form of photons. Follow-Up #1: photon acceleration?

Is a photon a wave or a particle?

Quantum objects (photons are an example) show wave-like behavior in some circumstances and more particle-like behavior in other circumstances. You can treat a photon as having a specific mass, its energy divided by c 2, so long as you’re careful about the meaning of ‘mass’. Here you’d mean the ratio of the momentum to the velocity.

Do photons decelerate when they travel around a massive object?

According to theory of relativity ,When light rays travels around the massive object,their path gets deflected.My Question is that whether this deflection causes some deceleration of photons or not? and how? No, the speed of light remains the same. Only the direction is changed.