Suppose that you close one eye, and see two objects, C and D. As you move your head toward the right, C appears to move toward the left compared to D. Which object is closer? Explain.

To determine which object is closer when you close one eye and see C and D appearing to move in opposite directions, you can apply the concept of parallax.

Parallax refers to the apparent shift in the position of an object when viewed from different angles. In this case, as you move your head to the right, the object C appears to move towards the left, and D remains relatively stationary.

To understand which object is closer, consider the following steps:

1. Close one eye: By closing one eye, you eliminate the depth perception provided by binocular vision, which allows us to perceive depth using both eyes.

2. Observe the direction of movement: As you move your head, C appears to move in the opposite direction (towards the left). This indicates that C is relatively closer than D.

3. Apply the concept of parallax: The concept of parallax states that the closer an object is to our point of view, the more it appears to move when our viewpoint changes. The apparent movement of C towards the left suggests that it is closer to your viewpoint compared to D.

Therefore, based on the observed motion, object C is most likely closer to you than object D.