Final answer:
According to the law of reflection, if sunlight strikes a mirror at an angle of incidence of 40°, the angle of reflection will also be 40°.
Step-by-step explanation:
When sunlight strikes a mirror at an angle of incidence of 40°, the angle of reflection is also 40°. This principle is based on the law of reflection, which states that the angle of reflection equals the angle of incidence, with both angles measured relative to the perpendicular to the surface at the point where the light ray strikes the surface. Therefore, if the angle of incidence is 40°, the angle of reflection will also be 40°.
The law of reflection states that the angle of reflection equals the angle of incidence. So, if the angle of incidence is 40°, then the angle of reflection will also be 40°. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface.