Question

why their is a red light on tower​

Answer 1

Bcoz it has high wave length and can be seen from large distance. Hence red light is used in the tower

Answer 2

1. Towers such as signal towers, sky skippers towers have red light to make pilates of aircraft aware about the buildings or structure to reduce the risk of collision and accidents.

2. Towers have only red light because red light have highest wavelength due to which it can travel long distances and can be seen easily from a long distances also in situations of fog, frost, rain, etc

hence, there is red light on high tower.

hope it helps...