To use the emergency signal mirror, you should face a point about halfway between the sun and the object you wish to signal.

To use the emergency signal mirror, you should face a point about halfway between the sun and the object you wish to signal.

• A. Quarter way
• B. Halfway
• C. Three quarters
• D. Full way

Answer: (B)

Directing a signal mirror relies on the law of reflection: the light from the sun that hits the mirror must bounce off toward the target, so the incoming and outgoing rays form equal angles with the mirror’s surface. Positioning the mirror so it points toward a point roughly halfway between the sun and the object set the mirror’s orientation to balance those angles. In that setup, the reflected beam lines up with the target, making the signal easier to see. You then fine-tune by rotating the mirror until you spot the bright spot or the target confirms the signal. As a safety note, avoid looking directly at the sun while handling the mirror.

Directing a signal mirror relies on the law of reflection: the light from the sun that hits the mirror must bounce off toward the target, so the incoming and outgoing rays form equal angles with the mirror’s surface. Positioning the mirror so it points toward a point roughly halfway between the sun and the object set the mirror’s orientation to balance those angles. In that setup, the reflected beam lines up with the target, making the signal easier to see. You then fine-tune by rotating the mirror until you spot the bright spot or the target confirms the signal. As a safety note, avoid looking directly at the sun while handling the mirror.