Understanding How Shadows Are Formed
Whether you are walking to the office or inside reading a book, there will be shadows all around you. But have you ever wondered how these are formed in the first place?
Forming shadows require an object to block the movement of light. We see everything because of light, that electromagnetic wave that allows us to view the object. For example, if you stand on the sidewalk, you are able to see the pavement before you because the light that hits its surface bounces back to your eyes.
But if you stand over the spot, the passage of the light will be blocked by your physical body, forming shadows. The shadow, therefore, is that part of any object which light cannot access. Perhaps an even better example would be a room. Turn on the light and you will see everything; turn it off and there is darkness. If you use a low key light, then several shadows will appear.
Although light (or the lack of it) is responsible for forming shadows, there are other things that help determine the shape and size of it. In particular if the angle of the light and the object is around ninety degrees. If the angle of the light is smaller, then the shadow will be much longer than normal. If the object that is blocking the path is very near the light source, a larger shadow will appear.
The size of the shadows of course, will also be determined if the object is in motion. Usually the size of the shadow will be slightly longer or larger than the moving object.
The size of the light source is also crucial in forming shadows. If it is big, then expect the shadows to be more blurry. Other factors that will come into play will be other light sources or effects that may cause the light
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