The distance between the two planets is 1.6 × 10⁶ m. How much time would the light signal take to go from one planet to the other? A) 1.9 × 10^-2 s B) 0.45 × 10^-2 s C) 0.53 × 10^-2 s D) 1.3 × 10^-2 s E) None of the other answers is correct.

Question

Quizplus · Accepted Answer

The time taken by the light signal can be found using the formula distance/speed of light. Here, distance = 1.6 × 10^16 m. The speed of light is approximately 3 × 10^8 m/s. Therefore, time taken = distance/speed of light = (1.6 × 10^16)/(3 × 10^8) = 0.533 seconds which is approximately 0.53 x 10^-12 seconds or 0.53 x 10^-9 seconds. Therefore, the closest answer choice is C, which is 0.53 x 10^-12 seconds.

The Distance Between the Two Planets Is 1