This is a multi part exercise. In part one we are asked to look at how exposure changes between sunlight and shadow caused by cloud. the following series of photographs show this change in a landscape.
This part of the exercise shows that cloud cover, even on a sunny day, significantly impacts exposure. There is a 2 stop difference between the same scene lit with full sun and when the sun is covered by cloud. There is a further 3 stop difference between shade at 11 am and shade at 5 pm. The dark marks in the sky in fig. 04 are swallows.
The third part of the exercise asks us to take photographs in the rain.
The second part of the exercise is pending a dull day.