An object with a diameter of 4 ly emits a sudden flash of light. On Earth this brightness change is seen to evolve over a period of:
A)2 years.
B)4 years.
C)8 years.
D)16 years.

Question

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The Answer of An object with a diameter of 4 ly emits a sudden flash of light. On Earth this brightness change is seen to evolve over a period of:
A)2 years.
B)4 years.
C)8 years.
D)16 years.

An Object with a Diameter of 4 Ly Emits a Sudden