Final answer:
The question is related to the principles of geometrical optics, specifically the reflection of light and image formation through lenses and mirrors. High school students would solve it using the law of reflection and trigonometry to determine the change in the image's position on the wall triggered by tilting the mirror.
Step-by-step explanation:
The question involves understanding the behaviour of light as it reflects off a mirror and passes through a lens. In scenarios where a mirror is tilted, the law of reflection is essential to determine the new path of the light and consequently the new position of the image formed on the wall.
To solve such problems, one would typically use geometrical optics principles such as the reflection of light, image formation by lenses and mirrors, and trigonometric relationships to calculate the movement of the image spot on the wall. These types of problems are often encountered in high school physics courses, under the section of wave optics or geometrical optics.
For example, if we knew the angle of tilt and the distance of the mirror from the wall, we could calculate the height change (δy) of the image on the wall by applying the law of reflection and simple trigonometry.