Light refraction is the basis of many magic tricks. How does the medium inside the glass matter? Use baby oil or another type of clear liquid instead of water.Use a clear rectangular container instead of a rounded glass or jar.However, water molecules are close together and slow down the light and cause the. Since air molecules are far apart, light can travel through the air quickly and with very little refraction.
When light passes from a fast medium (air) to a slow medium (water), refraction, or bending of light, occurs. Does the size of the glass affect how far you need to be to see the arrow in reverse? Science Behind the Reversing Arrow Illusion. Try placing different objects or drawings behind the glass of water and see if all of them reverse directions.This is because now your eyes are now closer to the image than the focal point. If you move closer to the glass, you will notice that the arrow appears in the same direction as it is drawn on paper. In simpler terms, the light coming from the tip of the arrow refracts on its way to your eyes and instead of being on the right side, it is now on the left side.
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