[Everyone]

Hi, I'm currently revising relativity and i'm a bit stuck on two questions:
1. An observer in the lab frame sees two particles travelling respectively at V=+0.8c and V=-0.8c along the x-axis. What is the relative velocity between the two particles as observed from the laboratory?

2. Two particles in a high-energy accelerator experiment approach each other head-on with a relative speed of 0.890c. Both particles travel at the same speed as measured in the laboratory. What is the speed of each particle, as measured in the laboratory?

I understand that both of these questions involve using the lorentz velocity addition but i can't get the answers out. Any help would be appreciated. Thanks.

[Coursework.info]

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[jobo3]

Originally Posted by Everyone

Hi, I'm currently revising relativity and i'm a bit stuck on two questions:
1. An observer in the lab frame sees two particles travelling respectively at V=+0.8c and V=-0.8c along the x-axis. What is the relative velocity between the two particles as observed from the laboratory?

2. Two particles in a high-energy accelerator experiment approach each other head-on with a relative speed of 0.890c. Both particles travel at the same speed as measured in the laboratory. What is the speed of each particle, as measured in the laboratory?

I understand that both of these questions involve using the lorentz velocity addition but i can't get the answers out. Any help would be appreciated. Thanks.

How much do you know about velocity transformations? (I take it that's what you mean by "addition&quot

[Everyone]

yea i mean transformations. I have studied them and can solve most problems involving them but im not sure how to apply them to this situation.

[Everyone]

Originally Posted by jobo3

How much do you know about velocity transformations? (I take it that's what you mean by "addition&quot

yea i mean transformations. I have studied them and can solve most problems involving them but im not sure how to apply them to this situation.