The ratio of the capsuleās speed, as measured on the spaceship, to the speed of light; μ/c 1/4.
For the stated question-
Consider sending a communication capsule to an incoming spacecraft at 0.25c relative to the Earth's randomized variablesv = 0.25 c.
Thus,
Let capsuleās speed is μ = 0.25 c.
Speed of light is c.
Then, ratio;
Capsuleās speed/Speed of light = 0.25 c/c
Capsuleās speed/Speed of light = 0.25
Capsuleās speed/Speed of light = 25/100
Capsuleās speed/Speed of light = 1/4
Thus, the ratio of capsuleās speed/Speed of light is found as 1/4.
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