Does light always travel at the same speed in space away from our atmosphere?
Light in a vacuum travels at a constant speed, approximately 186,000 miles per second. However, because its speed is constant, whether you’re moving toward a light beam or away from a light beam, light will change the flow of time as it would appear to a stationary reference frame compared to how it would appear to a moving reference frame.
I think the it’s believed to, but I personally think it changes. If light can propel a solar sail through space, then it emits some form of force. If it can emit force, it has to absorb it too. Therefore, it meets resistance. If it can meet resistance, then it changes speed. It may be so small, it can’t really be calculated, but it has to change. I hope it makes sense how I said that.
