Final answer:
A good indicator of being in someone's blind spot is if you cannot see the driver's face in their side mirror, as it suggests they cannot see you. Understanding the concept of foveal vision helps explain why objects outside the immediate focus area appear less clear.
Step-by-step explanation:
A good clue that you may be in someone's blind spot is if you cannot see the driver's face in their side mirror. When driving, being aware of blind spots is crucial for safety. If you can't see the driver in their side mirror, they likely can't see you either, and you are probably in their blind spot. This means you should adjust your position either by speeding up or slowing down to ensure you are visible to them and avoid a potential collision.
Additionally, being aware of the limitations of human vision such as foveal vision can play into this understanding. Concentrating your gaze on one area, such as a mirror, causes the clarity of other objects to diminish due to peripheral vision being less precise than foveal vision. For example, when you look at the letter G in the word 'ROGERS', letters on either side may appear less clear, demonstrating the sensitivity of foveal vision.