I would have thought a laser pointer would do the trick.
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.
A straight line has 180 degrees.
Light the electromagnetic wave.
Trajectory
I have the straight answer from the Internet and my science teacher that light travels in the motion of waves.
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.
The observation that light travels in a straight line can be explained by the property of light known as rectilinear propagation. This property states that light travels in a straight line in a homogenous medium.
Electricity.
A laser
Ray
A ray is an imaginary line that represents the direction in which light travels. It is often used in geometry and optics to model the path light takes when it hits a surface or travels through a medium.