How does Light Travel in a Straight line?

Answer: Light is a well known phenomenon to all of us. We also know that it travels in a straight line. However, this isn’t the whole truth. Light actually travels as a wave. A wave has crests and troughs on it which keeps on repeating. Similarly, light also has this wave pattern with crests and troughs but due to having a very small wavelength, we can’t really feel it. So, we observe it as a straight line. Light can change its path by changing its path due to refraction and reflection.