Incident light ray
Back up the indecent beam path.
Refraction
yes
Yes true
Beam of light to our muscle...
Since a laser beam is light all moving on the same direction, the path of a laser beam will be a straight line, inless it is redirected by a reflective surface.
Back up the indecent beam path.
Refraction
yes
Yes true
Beam of light to our muscle...
It means anything that doesn't follow the path that a light beam would take.
A cuboid may or may not be transparent to light. In the latter case, light will not travel through the cuboid.The path of a light beam through a transparent cuboid depends on the angle at which the beam is incident on the surface of the cuboid as well as on the optical properties (uniform refractivity or not) of the material of the cuboid.
It means: light of the path
mode means path, the way in which light travel, in the fiber means angle in multi mode fiber light can travel in more then one angle so it is called multi mode fiber. but in single mode fiber there is dedicated path or single path through which light beam/source can travel.
The beam of light is reflected back directly along its original path. I assume you are asking what happens if the light beam is exactly perpendicular to the plane of the mirror. I am assuming we aren't getting into such things as quantum mechanics where the answer to the question could be a bit freaky depending on the ideal nature of the conditions.
Water will bend a beam of light. Try this put a stright pincil in a glass of water. The pencil is still stright but looks bent. The water is bending the beam of light.