Say whether the Tyndall effect is the cause of what we see…

Say whether the Tyndall effect is the cause of what we see. Give a short reason each time.

1. The beams of car headlights show up in fog.
2. A laser pointer's beam cannot be seen from the side in clean air.
3. Shafts of sunlight show through the trees on a misty morning.
4. A torch beam cannot be seen inside a clear sugar solution.