Yes , but right now I am asking why is A at (-2,0) and not at (6,0)?
For A is used in the later part B , I don't have the question with me now , so I can't really describe the part B of the question...
So here's how it goes.
Find the coordinates of the centre and the radius of the circle
x^2 + y^2 - 4x + 6y -12 =0
a)If the circle cuts the x-axis at the points A and B , find the length of line segment AB.
My question is , I have actually found 2 points , they are
(-2,0) and (6,0)...
@ Your first answer , what is the relationship between frequency and energy? Pi is that 3.142 thing.. ?
Does that means that light is going straight , but the path it is moving is not straight , but bent? So to us it appears to be curved? And was the path that the 'ball' take spacetime...
Hi all , its my first post here in PF.
Well basically , I have this really simple question (To you guys , but its hard for me).
Why does Gravity affects light?
In school , we are taught that gravity affects things that has mass. Now since light is composed of photons and since they are...