Question

What changes can you observe among morning,afternoon and evening?

Answer 1

Answer:

It is long time that I am looking for what physical reason(s) explains this observation:

the sun ambient light between sunrise and midday is crispy, somehow whiter than that of the afternoon hours. In other words it is like that morning outdoor light is more similar to that of a white lamp, and that of afternoon more yellow and incandescent bulb -'like.