Originally Posted by sumitlian
Hey guys !
Sorry for my dumb question, I am an ultra noob/idiot in this.
But please someone tell me if the speed of radiation having energy lower than visible light (what we are actually able to see) and a wavelength higher than visible light exceeds the 3x10^8 m/s ? Can those microwaves travel faster than visible light or photon ?
Is it just visible light Or is it the total radiation (VHF to gamma) which travels at c=3x10^8m/s ?
All forms of light (microwave, radio waves, visible light, infrared, ultraviolet, x-rays, etc) travel at the same speed. Einstein's theory of general relativity (which has been shown to be true) says that light travels at the same speed with respect to you no matter what speed you are moving at. If you're moving at half the speed of light, you will still see light coming towards you and moving away at the speed of light.
Confusing, isn't it?
That's where red shift and blue shifts come into play, which is what we use to determine whether or not something is moving away or towards us. It's the same principle as when a car comes towards you, the sound is higher pitched than when it's moving away from you.
Originally Posted by Tokkan
I remember when I was a kid, History Channel would show up documentaries about fossils and ancient civilizations.
Nowadays everytime I check that channel they always speaking about aliens and trying to explain everything that might've occurred with aliens, they like to call it the "ancient astronaut theory".
The 1st time I saw it, it was interesting but the past 3 month's everything they talk about is that same theory... so yea.
One more theory in the world.
I remember watching Modern Marvels on the History Channel all the time. Now it's complete crap...