Final answer:
To change the direction of the laser beam in her light show, Aaliyah should adjust the angle of the mirror. If she wants to further alter the path of the reflected beam, she should either increase or decrease the angle, based on the specifics of the desired light effect.
Step-by-step explanation:
If Aaliyah used a 210° angle for the laser and a 60° angle for the mirror, she needs to decide whether to increase, decrease, or keep the angle of the mirror the same for her light show. According to physics, when a mirror is rotated by a certain angle, the reflected light ray changes direction by twice that angle. So, if the goal is to alter the direction of the laser beam by a specific amount, she should adjust the angle of the mirror accordingly. If her current setup does not achieve the desired effect, and she wants to change the direction the light ray is traveling after it hits the mirror, she should consider either increasing or decreasing the angle based on the desired beam path.
If the mirror's angle is rotated such that it creates a larger angle with the incident beam, the reflected beam will swing further from its original path. Conversely, if a smaller angle is necessary for the desired effect, she should decrease the angle of the mirror. Without additional context about the desired outcome of her light show setup, it's hard to say definitively whether she should increase or decrease the angle. However, she does not need to use a different mirror unless there is something functionally wrong with the current one.