Final answer:
Aaliyah should try setting the mirror to a 45° angle next, as per the law of reflection. When a mirror is rotated by an angle, the direction of the reflected ray changes by twice that angle, hence rotating the mirror to 45° would change the light ray's direction by 90°.
Step-by-step explanation:
Considering the information provided, Aaliyah is likely experimenting with the angle of incidence and reflection during a physics experiment involving a laser and a mirror. The law of reflection states that the angle of incidence is equal to the angle of reflection. This principle holds true regardless of the angle at which the mirror itself is positioned; when a mirror is rotated by an angle θ, the reflected ray changes direction by twice that angle, or 2θ.
So, if Aaliyah originally used a 210° angle for the laser and 60° for the mirror, rotating the mirror to a different angle will change the direction of the laser beam. To achieve a certain directional change of the reflected beam, she might consider adjusting the angle of the mirror to 45° to explore different reflective behaviors.
In this scenario, if Aaliyah changes the angle of the mirror to 45°, then a light ray's direction would change by 90° when reflected, which might be what she is aiming for in her experiment. Hence, option A (45°) could be the next angle Aaliyah should try for the mirror in her experiment with lasers and mirrors.