I think the most beautiful shadow is that of the comic book hero Lucky Luke, who shoots faster than his own shadow! Here I have copied the original by artist Maurice de Bevere (1923-2001) and changed it a bit.
Such a shadow of an object (in this case Lucky Luke) on the ground, wall or other surface is called a cast shadow. The more the light comes from the side (from the sun or a lamp or a candle), the longer the drop shadow. This is shown below with a kind of obelisk. Further away from the obelisk, the drop shadow fades slightly. I recommend not to draw a line around such a real shadow. The edges should remain a bit fuzzy.
Exercise 1: draw some obelisks or a columns and try out a few different light directions from the left and right.
In wintertime the sun is very low and you get super long drop shadows. It looks really crazy when the sun is shining behind you and you see your legs completely stretched. A good stretching exercise for which you do not have to do anything. Maybe you also like to draw such an elongated drop shadow.
With Lucky Luke, it seemed as if the shadow was crawling up against a wall. In the next two drawings by pupils, the drop shadow even crawls up a staircase. By the way, shadows aren’t always black, they can have a color! Just look at the paintings of the French painter Claude Monet.
Exercise 2: Draw a figure with a drop shadow climbing up a wall or a staircase.
EXTRA: in the following still life only the outlines are drawn. First draw the still life as lightly as possible. Then draw the shadows that arise when the (side) light comes from the left. Draw the shadows on the objects as well as the drop shadows. You will find an elaboration in Chapter 4.
NB: you can download and print out every chapter or just an image from basic pencil and therefore also this still life. You then only have to draw the shadows.