i think its to do with the sun, when the sun moves the size of your shadow moves. at midday its the shortest :))
It is because of the angle of the sun and your height.
summer shadows are shortest and winter shadows are long.
Shadows lengths are less in summer than winter.
winter
For vertical objects, shadows are shortest when the Sun (or other light source) is directly overhead. This is when taller objects have their shadows under or near them. For horizontal objects, the shadow is shortest when its longest cross section is parallel to the beam from the light source.
The summer nights are shorter while the winter nights are longer.
The shadows in the Northern Hemisphere are generally longer in the winter than in the summer. Therefore in the summer the shadows are shorter because the sun is more vertical.
In the summer, the sun is higher in the sky, casting shadows that are shorter. In the winter, the sun is lower in the sky, creating longer shadows. This difference in the angle of the sun's rays causes the length of shadows to vary between the seasons.
In winter shadows are longer, in summer they are shorter.
The sun stays closer to the horizon, which makes the shadows longer.
summer shadows are shortest and winter shadows are long.
Shadows lengths are less in summer than winter.
winter
For vertical objects, shadows are shortest when the Sun (or other light source) is directly overhead. This is when taller objects have their shadows under or near them. For horizontal objects, the shadow is shortest when its longest cross section is parallel to the beam from the light source.
Shadows are long in the evening and morning. They are at their shortest during mid-day. Shadows are also much longer in the winter than they are in the summer, due to the low sun angle.
At noon in Summer, the Sun is high in the sky, so the shadows are shorter. At noon in Winter, the Sun is low in the sky, so the shadows are longer. A winter sun is more likely to dazzle you, as it is lower in the sky throughout its travel between dawn to dusk.
At the winter solstice, the shadow cast by the midday sun is longer than on any other day of the year, and at the summer solstice, it is as short as it ever gets.
The summer nights are shorter while the winter nights are longer.