Light the electromagnetic wave.
Electromagnetic radiation, such as light and radio waves, travels in a straight line. The fastest particle currently known is the neutrino, a subatomic particle with almost no mass and no electric charge.
Trajectory
It does not, it travels as a wave
Visible light travels in a straight line unless it encounters obstacles or mediums that cause it to bend or scatter.
The acceleration of an object that travels in a constant straight line velocity is zero.
straight line method
Light typically travels in a straight line, as described by the principle of rectilinear propagation. However, it can be affected by gravitational fields or optical illusions that may make it appear otherwise.
A straight line is one which travels in exactly one direction, never bending or curving.
Electricity.
A laser
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.
travels through a uniform medium