What exactly is gravity? Is it a wave or a ray? What exactly is the attraction that makes gravity...
If I knew the centre of the universe and began to travel toward it, would I begin to decrease in...
from Nottingham, England
Is gravity lumpy? If you were standing in a valley, then on a mountain, would your weight be less...
If one were to drop an item on the surface of the sun, assuming the object could free fall to the...
Could you explain the idea that gravity could be thought of a depression or well, much like when a...
from Berkeley, CA
I understand why magnetism is a relativistic effect, "caused" by Lorenz contraction effectively...
Karl-Alexander Berg Brisebois
Conservation of momentum can explain the exchange of a virtual photon between two electrons and the...
Supposedly in classical electromagnetism an accelerating charge radiates. If so, why? If so, then...
A black hole is a central point the size of a pinhead where a huge amount of mass is concentrated....
Sylvain Koenig from the University of Lausanne (Switzerland)
Why would one person when he returns from travel at the speed of light have aged differently than...
from Pune, India
1. I would like to know when was Hubble's constant discovered / invented?
2. How many times it...
What are the most recent theories about what existed before our big bang? Have there been one or...
Karl-Alexander berg brisebois
Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the...
Light cannot escape from a black hole, because of the black hole's mass. If this is true, then...
from Split, Croatia
What happens when electrons pass through a magnetic field at a velocity near lightspeed?
In the constellation of Pegasus there is an object called "Einstein's Cross". I understand that...
from Darwin, Australia
Why is quantum physics used to try and explain the future predicting behaviour of light as is shown...
I have a question about black holes. If light/matter are drawn towards a black hole are they not...
I am trying to find out how much light curves at the Earth's surface due to gravity. Ideally, how...
I understand that even in a finite volume, there are an infinite number of points. Why does the...
Assuming the speed of light, c, what would be the distance of a photon traveling in empty space be...
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