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Like some others, I personally cannot sleep unless it is completely dark in my bedroom. However with the placement of my bed in a dark area of my room, I'm surprised to find that I cannot sleep because there is still light shining on my bed. But why is there still light if the window in my bedroom is behind my bed, next to a wall? Shouldn't the light be blocked by the barrier? No! The light from the window still shines on to my bed, despite the wall barrier and placement of the bed and window, because there is a diffraction of the light waves. Diffraction occurs when light waves move past the edge of the barrier, bending the stream of light to another area. In my case, the light from my window was diffracting out past the wall barrier and around to the area where my bed is placed. The amount of diffraction of a light wave depends on both the wavelength of the wave and the size of the space the wave is traveling around. Because the wavelength of the light is constant and it is moving around a large space in my room, there is little diffraction. Based on my research on diffraction, there is not much I can do about lessening the light shining onto my bed in my bedroom. Even if I were to make the space that the light waves pass through smaller, diffraction would still occur. However, I did learn what causes diffraction and what effects the amount it gives off. It seems that my only solution is to get some very good, very strong curtains!
Drawing is much more complicated than many people think. It also has a lot to do with physics. The main physics behind drawing is light waves. This is because light is a type of wave, which carries energy like all other waves. Light is essential for drawing, or any other kind of art. Light allows you to see, and more specifically, it allows you to see an object’s shape, color and the shadows on it. Being able to see all these things makes it possible to take a 3D object and put it on a piece of paper. The way light lets you to see objects and colors is by reflection. White light is where all the colors in the spectrum of visible light appear all at once. Examples of this is the sun. These pictures show each color's wavelength. Red has a long wavelength, violet has a small shorter one. All of them together are white light. Different objects reflect a specific color, or type of light because of their different wavelengths. Space is the only true black because it absorbs all light and colors because there is nothing for light to reflect off of. An example of light reflection creating colors is an apple. When you look at it, you see it as the color red. This is because red light is reflected off of the apple and into receptors in your eye, and all the other colors are absorbed into the apple. So, when you are trying to draw or paint, or whatever else, you have to look at an object and observe its light. This object reflects light and creates color. But there are also shadows. Rounded objects allow light to diffract. Light waves want to travel in straight lines, but when they run into an object, they diffract, or bend slightly around the edge. This makes your eye see the object get gradually darker until there is barely any light reaching it, on the side facing away from the light waves. This is why it’s difficult to accurately draw things unless you know how to look at the light instead of just the object itself. Looking for the light and dark spots of the object is what makes it look 3D on paper. I have always wondered why it seems so hard to draw, but now I know its because I’ve just been looking at the shapes instead of paying more attention to the light on it. I’ll have to keep that in mind.