Light travels in a straight line at a constant speed of 300,000 meter per second. What is the acceleration of light?

If it has a constant speed then it's not accelerating, is it?
BTW I think it's 3x10^8m/sec or 300,000,000 m/sec. It would be 300,000km/sec.

Since it is moving at a constant speed it has no acceleration.

You are correct. Light travels at a constant speed of approximately 3 x 10^8 meters per second (or 300,000 kilometers per second) in a vacuum. Since it maintains a constant speed, its acceleration is zero.

You are correct, light travels in a straight line at a constant speed of approximately 300,000 kilometers per second (or 3 x 10^8 meters per second). Since light travels at a constant speed, it does not accelerate. Acceleration refers to a change in speed or direction, and in the case of light, it maintains a constant velocity throughout its journey in a vacuum. Therefore, the acceleration of light is considered to be zero.