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# An inertial observer sees a particle moving at a speed 3c/5.

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A.7 Give a very brief description of two observational tests of general relativity.

A.8 An inertial observer sees a particle moving at a speed 3c/5. It then is seen to decay into two photons. Draw an accurate spacetime diagram to illustrate the situation before and after the decay takes place.

A.9 What energies, expressed in terms of the rest mass energy of the inertial particle, would the observer in question A.8 measure for the two photons.

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#### Solution Preview

Solution:
A7 :- The two observable tests of General Relativity are
(i) The light should be bent by the gravitational field.
and (ii) Time should appear to run slower near a massive body.

A8 :- There is no facility to draw this diagram for the time being.

A9 :- Let m = rest mass of the inertial particle
m1 = mass of one photon
m2 = mass of another photon
E1 = energy of the photon ...

#### Solution Summary

This solution is comprised of a detailed explanations of the problems of the special theory of relativity.
It contains step-by-step explanation for the following problems:
A.7 Give a very brief description of two observational tests of general relativity.

A.8 An inertial observer sees a particle moving at a speed 3c/5. It then is seen to decay into two photons.
Draw an accurate spacetime diagram to illustrate the situation before and after the decay takes place.

A.9 What energies, expressed in terms of the rest mass energy of the inertial particle, would the observer
in question A.8 measure for the two photons.

Solution contains detailed step-by-step explanation.

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