The light comes from the sun. How many times is it refracted?

It is impossible to answer this question, since the density of the atmosphere is constantly changing. How many times the density of the atmosphere changes, so many times the light beam is refracted.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.