Monty from saskatchewan asks

What exactly is gravity? Is it a wave or a ray? What exactly is the attraction that makes gravity...

John Crowe from Dublin asks

If I knew the centre of the universe and began to travel toward it, would I begin to decrease in...

Dom Elbon from Nottingham, England asks

Is gravity lumpy? If you were standing in a valley, then on a mountain, would your weight be less...

Hammad from Phoenix asks

If one were to drop an item on the surface of the sun, assuming the object could free fall to the...

Shane C. asks

Could you explain the idea that gravity could be thought of a depression or well, much like when a...

Karl-Alexander Berg Brisebois from Dunham asks

Conservation of momentum can explain the exchange of a virtual photon between two electrons and the...

Michal Jaworski from Calgary asks

A black hole is a central point the size of a pinhead where a huge amount of mass is concentrated....

Sahm Atman from Berkeley, CA asks

I understand why magnetism is a relativistic effect, "caused" by Lorenz contraction effectively...

BALKRISHAN ARORA from Pune, India asks

1. I would like to know when was Hubble's constant discovered / invented? 2. How many times it...

Sahm Atman from Berkeley asks

Supposedly in classical electromagnetism an accelerating charge radiates. If so, why? If so, then...

Sylvain Koenig from the University of Lausanne (Switzerland) asks

Why would one person when he returns from travel at the speed of light have aged differently than...

Karl-Alexander berg brisebois from Dunham asks

Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the...

David Graveline asks

What are the most recent theories about what existed before our big bang? Have there been one or...

Jen Collard from Brockville asks

Light cannot escape from a black hole, because of the black hole's mass. If this is true, then...

Marin from Split, Croatia asks

What happens when electrons pass through a magnetic field at a velocity near lightspeed?

Christian from Peterborough asks

In the constellation of Pegasus there is an object called "Einstein's Cross". I understand that...

Matthew from Darwin, Australia asks

Why is quantum physics used to try and explain the future predicting behaviour of light as is shown...

Brent Harrington from Bolton asks

I am trying to find out how much light curves at the Earth's surface due to gravity. Ideally, how...

Christian from Peterborough asks

I have a question about black holes. If light/matter are drawn towards a black hole are they not...

Peter Schwarz from Toronto asks

I understand that even in a finite volume, there are an infinite number of points. Why does the...

Scott Mayers from Saskatoon asks

Assuming the speed of light, c, what would be the distance of a photon traveling in empty space be...