00:01
Three rods are joined to form a 45 -4590 triangle, which is placed at rest in the x prime, y, prime plane, with its hypotenuse going along the x prime axis.
00:12
O prime moves away from o in the direction x as at a speed of 0 .92c, what are the angles of the triangle according to o? okay, so you have this 45, 45, not drawn to scale, of course, 45, 45, 90.
00:31
Triangle.
00:35
So we have v is equal to 0 .92c.
00:40
If this site is a, this site is a, this side is l, then by pythagorean theorem, l is equal to the square root of 2a.
00:52
So to get the height of the triangle, the height of the triangle is a sign of 45 degrees, which is a over root 2a.
01:09
Only length along the direction of motion will change...