Variation law of shadow direction

The change law of shadow direction includes the change of sun shadow direction, the change of object shadow direction, the change of building shadow direction and so on.

1, the change of the sun's shadow direction

During the day, the position of the sun changes with time. The shadow of the sun will also change. For example, at sunrise and sunset, the sun is low, the shadow is long, and the direction is opposite; At noon, the sun has the highest position and the shortest shadow, which is almost impossible to observe. The change of the direction of the sun's shadow is determined by the position of the sun.

2, the change of object shadow direction

Objects can also produce shadows under the irradiation of sunlight or artificial light sources. When the position of the light source changes, the shadow of the object will also change. For example, when the light source shines from the left side of the object, the shadow of the object will appear on the right side of the object. If the light source moves to the right, the shadow will also move to the right. The change of object shadow direction is determined by the position of light source.

3. Changes in the direction of architectural shadows

Buildings can also produce shadows under the irradiation of sunlight or artificial light sources. If the height and shape of a building are different, its shadow will take on different shapes and directions. For example, tall buildings will produce short shadows in the sun, and short houses will produce long shadows. The direction change of building shadow is determined by the height and shape of the building.

The application of the changing law of shadow direction in the art of life;

1, the application in life

Shadows can help us judge time and direction. When the sun rises, our shadow will become very short, and when the sun sets, our shadow will become very long. By observing the length and direction of the shadow, we can roughly judge the time and direction. This is very useful for those who don't have a watch or compass.

2. Art application

Shadows also have important applications in artistic creation. Many artists will use shadows to create unique works. For example, some photographers will take advantage of the changes in sunlight and shadows to take beautiful photos. Some painters also use shadows to create three-dimensional paintings. Shadow can not only increase the artistic sense of the work, but also make the work more vivid and interesting.

3, entertaining.

Shadow also plays an important role in children's education. We can use toys and lights to show the changes and characteristics of shadows, so that children can better understand the formation principle of shadows and the basic characteristics of objects. This entertaining way can stimulate children's curiosity and creativity, and also help them to better understand and understand the world.