RelativityBy: Kelan Rachel

Spatial/ Galilean Relativity

Galileo simply described this as the fact that an

observer in motion sees things

differently from a stationary observer

We use this as a part of our everyday

experience

Albert Einstein •German physicist •Developed 2 theories on relativity

1. Special theory of Reality

2. General theory of Reality

•Believed that relativity teaches us the connection between the difference descriptions of one and the same reality

Special Relativity Published in 1905 in Einstein's paper :

On the Electrodynamics of Moving Bodies Deals with things moving near or at the

speed of light Based on two postulates

1. The law of physics are the same in all inertial (non-accelerating) reference frames

2. The speed of light in free space is constant

Einstein’s FormulaRelating mass & energy

Energy = mass times speed of light squaredEinstein’s equation implied that tremendous energies were

contained in small masses

Explanation of the Special Relativity Theory

General Relativity Published in 1915 Explains the force of gravity in terms of curving

four dimensional space-time.According to Einstein the forces of acceleration &

gravity areEquivalent.

This theory is based on one thing1. That all physical laws can be formulated so it can be

valid for any observer, regardless of the observer’s motion

Explanation of General Relativity

The End