
Originally Posted by
Michael Joseph
Here's a puzzler. I was told that light has speed as to imply that light travels across a distance in a certain time. However, may I ask you, does light "slow down" when it is refracted thru a medium? And if it "slows down" then how or by what force does it speed up? And given that Space is not a vacuum, then how is it that one can say Light has a certain speed? Could it be that the models are incorrect?
"They say" the wave length changes however the frequency remains the same. I ask again, by what force does light accelerate back to approximately 186000 mi/s or 300,000 km/s? But then one will argue that speed is of light in a vacuum.
So then if light leaves a vacuum enters into a certain medium and returns to a vacuum, what then? Curious thoughts - that's all. Perhaps light does not have "speed" but is a property of "fields" electric/magnetic. What then of time?
Best regards,
MJ