A geodesical path
Trajectory
light always travells in straight line
Yes, a shadow is proof that light travels in a straight line because shadows are formed when an object blocks light that is traveling in a straight path from the source to the surface where the shadow is cast. If light did not travel in a straight line, shadows would not form as they do.
A straight line that represents a light wave is called a ray. It is used to show the direction of light propagation in geometrical optics.
A straight beam of light is called a ray of light. Rays of light travel in a straight line from their source until they are interrupted or reflected by a surface.
Place objects in the path of a beam of light in a dark room. If the beam is blocked by the objects, light is not traveling in a straight line. However, if the objects cast distinct shadows with sharp edges, it demonstrates that light does travel in a straight line.
travels through a uniform medium
a column it is also called a convoy when military vehicles are used
Light traveling in a straight line is important for various daily activities such as reading, driving, and photography. It allows us to see objects clearly, helps with navigation, and is essential for capturing images accurately. In addition, technologies like fiber optics rely on the principle of light traveling in a straight line for communication purposes.
If light did not travel in straight lines, the behavior of light would be unpredictable and difficult to control. This could impact a wide range of technologies and industries that rely on the principles of light traveling in straight lines, including telecommunications, photography, and medicine. The way we perceive and interact with the world would also be fundamentally altered without the consistency of light's straight-line path.
A geodesical path
I get 33,278,000,000,000 years.That's IF you could travel in a straight line.