TIME V/S SPEED

                   Time And The Speed Of Light

A property of light is that it always travels at the same constant speed in a vacuum of 186,000 miles a second (700 million mph) and you can’t go any faster. The reason for this is that mass increases with speed all the way to infinity and so an infinite amount of energy would then be needed to travel beyond the speed of light.

The equation states that: speed = distance ÷ time; therefore, if the speed of light (c) is to remain fixed then the distance and time in the equation will need to change. What actually happens is that time and distance are ‘relative’ to one another, and as you travel close to the speed of light, distances become shortened while time is lengthened. This is explained in Einstein’s Theory Of Special Relativity.

For a person traveling at 99% the speed of light, Time slows for them by a factor of 7  If they were to travel to a star 7 light years away, at 99% speed of light, it would take them 1 year, but to an observer on Earth it would have seemed like 7 years. However, if that person attained 99.999% the speed of light, only 1 year would pass on-board for every 223 years back on Earth. Finally, You don’t need to travel at light speed for time dilation to occur but you won’t notice the effects until you go extremely fast.