Yes, if it is a straight line distance, apart from a strong gravitational field.
But a massive object bends space, so light waves focused by an intervening body like a galaxy might bend or even focus light waves. Those waves might travel a greater distance because of that bend, and take longer to arrive at a location.
If the energy originates from center of a black hole, it will not travel anywhere--too much bending of space in the singularity. And the light will be slowed to no motion at all.
As they are all different wavelengths of the same basic energy, which is light, yes, they all travel at light speed in a vacaum.
Yes. They all go at the same speed of light. Wavelength doesn't affect their speed.
They're all electromagnetic radiation, moving at the speed of light, so yes - it would take a year to travel a light year.
Yes, they all travel at the same speed which is the speed at which electromagnetic radiation propagates in a vacuum. Although usually called the "speed of light" it would be better called the "speed of a massless particle" because it is the speed at which all particles with zero mass travel in a vacuum: gravitons and masslees neutrinos as well as photons. The speed is 299,792,458 metres/second.
The all travel a the Speed of Light because they have Zero Mass
186, 000 Miles Per Second
all travel at the exact same speed in a vacuum, 186,262 miles 2096 feet 5 21/127 inches per second, so yes, one terrestrial year to go one lightyear
Yup, all forms of electromagnetic radiation (which these things are), travel at exactly the same speed, no difference to within a trillionth of a percent. Also gravity waves, and the strong nuclear force's carrier bosons travel at this exact speed too! Neutrinos are virtually massless, so they also travel pretty close to this speed.
Yes, they're all forms of light and can only travel at the speed of light.
They are all electromagnetic radiation and all travel at the same speed.
Look!!! The light by the bed! Quick, when you turn it on it will hit your eyes at the speed of ---what light? Yes!!!
Yes. These are all forms of light, so they all travel at the speed of light (light years).
Yes they do.
The only difference between them is their frequency and wavelength.
The equation that relates wavelength and frequency for electromagnetic waves is: λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.
In a vacuum or near vacuum, yes.
A light year is a unit if distance.
Yes is the short answer.
They all travel at the same speed in a vacuum, which is the speed of light which is approximately 186,282 miles per second.