You can see the Tyndall effect when you shine your headlights into fog. If you have your high beams on, some of the light gets scattered and sent back to you, making it hard to see. If you have your low beams on, you can see the beam in the air.
I once witnessed this effect in a scary situation. I was driving home on New Year’s Eve night, and the fog was so thick that I could not see more than two feet in front of my car.
My headlights allowed me to see the fog and the beam, but this did not help me navigate very well. I just had to pay close attention to the stripes on the road, and no matter what, I could not turn my high beams on, because that would be like looking at a yellow wall.