Final answer:
The question addresses the physics concepts of light reflection and refraction involving plane mirrors and concave lenses, as well as general relativity's principle of equivalence concerning light's behavior in a gravitational field.
Step-by-step explanation:
The student's question involves understanding the behavior of light as it interacts with different surfaces such as plane mirrors and lenses, which is a concept explored in physics. Particularly, the question refers to the reflection of light on a plane mirror, and the refraction of light when it passes through a concave lens. When a plane mirror is involved, the law of reflection states that the angle of incidence is equal to the angle of reflection, so the light path will change direction but remain at the same angle with respect to the normal (the line perpendicular to the surface at the point of incidence).
On the other hand, if a plane mirror is replaced with a concave lens, as mentioned in the question, the light rays that hit the lens will diverge after refraction. The concave lens causes the rays to spread out, as it is thinner at the center than at the edges. To draw the path of two incident rays through a concave lens, you would illustrate them bending outward away from the normal after passing through the lens.
In the context of curved spacetime and gravity's influence on light, the principle of equivalence suggests that in a uniformly accelerating frame of reference, such as a spaceship orbiting a planet, the path of the light would curve with the motion of the ship. This is a fundamental concept in general relativity, indicating that light is not strictly straight in a gravitational field but follows the curvature of spacetime. The curved light path as described in the scenario is an implication of gravity's effect on the trajectory of light.