In a spaceship that is approaching Earth at 80% the speed of light,the captain shines a laser beam directly toward Earth.The captain measures the laser light's speed to be 3.00 × 10⁸ m/s and the receiving station on Earth will measure exactly the same speed for this light.

Question

Quizplus · Accepted Answer

According to the principle of relativity, the speed of light is constant and independent of the motion of the source or observer. Therefore, the captain and the receiving station on Earth will measure the same speed for the laser beam, regardless of the relative motion between the spaceship and Earth. This is confirmed in the statement that the captain measures the laser light's speed to be 3.00 × 10^8 m/s and the receiving station on Earth will measure exactly the same speed for this light.

In a Spaceship That Is Approaching Earth at 80% the Speed