
So with this effect but I haven given a name to yet but we're going to call time dilation.

You'll see why in a minute and we have these equations relating

the rates at which different clocks tick.

And actually this number v/cI'm going to stop writing v/c.

Instead I'm going to use this number or variable β to represent the ratio of

a frame's speed to the speed of light and the variance are polishing things up,

let's go one step further and instead of writing t‘ like this, lets put the t out

and give this quantity in parenthesis its own name and the name I'm going to give

well, we've seen the α and β, it's time for the next Greek letter, is γ.

So now, our complicated equation becomes t'=γt.

So actually we want to understand what's going on here. We need to understand γ a little better.

So first let me tell you without giving you much proof and I'm sorry for doing it

that v the speed that we can move or about a frame of reference can move

well it has an upper boundit can't go any faster than c, can't go faster than the speed of light.

So we can go with the slowest 0 stop or up to the speed of light

which means that β is between 0 and 1.

That can't be equal to the speed of light.

I want you to tell me what's the minimum and maximum value for γ.

So for γ min, it's the lowest possible value of γ as it is low as we want.

Can it go to a negative or billionit's the lowest possible value 0 or is the lowest possible value 1.

Likewise, for γ max, it's the highest possible value that γ can be.

Is it 1, 2 or can γ max grow as large as we want.

So that's two questions. Select the best answer for each.