<em>At noon the sun is directly overhead the sun rays fall vertically on the body so the shadow is very short.</em>
<em>So the rays fall vertically on the body. in mornings and evenings the rays fall at inclined position. So shadows are long at mornings or evenings.</em>
Shadows are shortest at noon because the sun is directly overhead. So the rays fall vertically on the body. In the morning and in the evening, the rays fall at inclined position. So shadows are longer during morning and evening.
This process is called osmosis whereby water exits the cell through its selectively permeable membrane and into the salt solution to dilute and balance the pressure caused by the concentrated salt solution.
