Recent content by SHawking01

Okay, well I'll come back in a couple of hours or so. Thank you.

What should I do after this? Sorry.

Homework Statement A particle of rest mass m0 collides elastically with a stationary particle of equal mass and scatters at angle θ. The incident particle has kinetic energy T0 before the collision and T1 after the collision. (a) Show that T12 (2m0c 2 + T0) 2 = p02 p12 c4 cos2 θ. (b) Using the...

Homework Statement A rocket, initially at rest, propels itself in a straight line by giving portions of its mass a constant (backward) speed vout relative to its instantaneous rest frame. (a) Is rest mass conserved in this process? (b) Show that m0du′ = −dm0 vout, where m0 is the rocket’s...

Well, I went to my teacher and found the answer. But thanks for your help anyways!

In the rest frame of the mirror the angle of reflection equals the angle of incidence and there is no frequency shift.

Homework Statement A mirror moves perpendicular to its plane with speed βc. A light ray is incident on the mirror from the “forward” direction (i.e., vm · vl < 0, where vm is the mirror’s 3-velocity and vl is the light ray’s 3-velocity) with incident angle θ (measured with respect to the...

Okay, well I think I have it from here. Thank you!

∆s^2=c∆t^2-|∆r|^2 (this is the invariant interval right?)

r=c(τ2-τ1)/2

Is it (τ1+τ2)/2?

Sorry, I am not the smartest. We have to use the Lorentz transformation to find that, right?

Homework Statement An inertial observer O bounces a radar signal off an arbitrary event P. If the signal is emitted and received by O at times τ1 and τ2 respectively, as indicated by O’s clock, prove that the squared interval ∆s 2 between O’s origin event (i.e., its spatial origin at time τ =...