Please answer Part B only, thanks. Section C:RelativityQuestion 8"Cosmic rays" are high-energy particles, typically protons, that can enter the Earth'satmosphere from space. Suppose a cosmic-ray proton is travelling directly towardsthe centre of the Earth with kinetic energy, relative to the Earth, of 3.5 GeV.(a) If, in the reference frame of the Earth, the height of the Earth's atmosphere is10 km, how much time does it take the proton to pass through the atmosphereand reach the Earth's surface in the reference frame of the proton?Ek =(7-1)mc3.5×107-(7ー) (138x10°)=4.13V 0.98cd.ん=10km L%3D7.る3.41 XIo10 000%3DT= YT4.73%3D%3D(b) What is the spacetime interval s? between the event where the proton enters theatmosphere and the event where the proton reaches the surface of the Earth?Is it possible for these events to occur at the same location in another inertialreference frame? Justify your answer in one or two sentences at most.

In this question, we use the space interval (△s)2=(c△t)2-(△x)2 between the events where the proton…

(b) What is the spacetime interval s between the event where the proton enters the atmosphere and the event where the proton reaches the surface of the Earth? Is it possible for these events to occur at the same location in another inertial reference frame? Justify your answer in one or two sentences at most.

(b) What is the spacetime interval s between the event where the proton enters the atmosphere and the event where the proton reaches the surface of the Earth? Is it possible for these events to occur at the same location in another inertial reference frame? Justify your answer in one or two sentences at most.