If we had detected a signal from an advanced civilization in 2013 which was located at a distance of 7 light-years from the Sun, in what year was the signal actually transmitted?
A) 2007
B) 2013
C) 2020
D) 2006

Question

Quizplus · Accepted Answer

The signal would have taken 7 years to travel from the source to Earth, so we need to subtract 7 years from when we detected the signal in 2013. This gives us the year the signal was actually transmitted.

2013 - 7 = 2006

Therefore, the correct answer is D) 2006.

If We Had Detected a Signal from an Advanced Civilization