Final answer:
When confronted with an oncoming driver who doesn't dim their headlights, look toward the right edge of your lane and avoid the glare, slow down, and proceed with caution. Do not look directly at the bright lights, and don't retaliate with aggressive behavior.
Step-by-step explanation:
If an oncoming driver does not dim their headlights, the first thing you should do is avoid looking directly at the bright lights to prevent being blinded. Instead, look toward the right side of your lane and focus on the white line that marks the edge of the roadway; this will help you stay on course while avoiding the glare. It's also crucial to slow down and drive cautiously until you have safely passed the other vehicle. Remember, it's not safe to flash your lights or retally in a similar aggressive manner as it could result in hazardous situations for both parties.
Regarding the observation of lights dimming in other scenarios, such as in a refrigerator or a car's passenger compartment, this typically occurs because of a temporary drop in electrical supply due to increased demand elsewhere in the circuit, often from a motor starting up.