Final answer:
The acceleration of light from the nearest star to Earth is zero because light travels at a constant speed in a straight line without any external force acting upon it.
Step-by-step explanation:
The student's question pertains to the speed of light and acceleration as it travels from the nearest star to Earth. Given the constant speed of light at 3.0 × 108 m/s, and considering that light travels in a straight line without any external forces acting upon it in space, the acceleration of light would be zero. When an object moves at a constant speed in a straight line, it maintains its velocity and does not accelerate. This is in accordance with Newton's first law of motion, which states that an object in motion will not change its velocity unless an external force is applied to it. Therefore, despite the vast distance it covers, the acceleration of light from the nearest star to Earth remains zero.