refraction experiment with pencil

When light enters a new substance (like going from air to water) perpendicular to the surface (looking straight on), refraction does not occur. Full disclosure: I didn’t know that refraction was what this experiment demonstrated. The first activity (The Broken Pencil activity) involves a simple and interesting set of Light Refraction Pencil Science Activity. of refraction. This next activity is a quick science demonstration that can be implemented with or without the student exploration part (but I always love incorporating that because the students love a good challenge that makes them think.) Guiding the activities insures that students get off to a good start on their study of refraction. A pencil looks bent in water because of a phenomenon called refraction. This light ray changes medium and subsequently undergoes refraction. You’ll notice that the pencil doesn’t always appear broken. Some pencils have flat edges while others have perfectly round, smooth edges. I found a great light refraction experiment video on YouTube and decided to try it with Tigger. Experiment with different sizes and shapes of pencils. Experiment further: Now that you have an idea of how refraction works, see if you can think of different ways to make a magnifying lens with water, or make other tricks like the penny experiment. As you sight at the portion of the pencil that is submerged in the water, light travels from water to air (or from water to glass to air). As light enters water at an angle, it bends away from its original path, and this makes the image look bent. Draw arrows on one piece of of card or paper. When going from a faster to … As a result, the image of the pencil appears to be broken. This concept of bending can be calculated by Snell’s Law of determining the “index of refraction, a constant, for light traversing the boundary between two specific media” (light and shadow - let’s do science) The Pencil Experiment. Place a pencil in a glass filled with water and what do you notice? Materials for Light Refraction Experiment. Does sugar water or salt water change how big letters get if you look through it compared to plain water? We’re continuing with our simple science experiments this week by taking a look at light refraction. Paper or card. Images that we see are all light rays that reach our eyes. What do you see? Depending on where your eyeballs are, you can see an intact or broken pencil. Fill the glass almost to the top. Which type of pencil … Instructions. Glass. Bending Light-- sticking a straight pencil into a clear plastic glass of water, the kids are able to see how the light moves through water and appears to "bend" the pencil. The trick behind the Disappearing Money experiment is the refraction of light. Water. Some drawings (or pencil and paper) Instructions for Light bending: For step-by-step instructions on how to conduct this experiment watch the video on the beginning of the article or continue reading… Draw some images you would like to test; Pour water into a glass; Put the image behind the glass and look at it through the water. That’s why you can still see the penny through the side of the empty glass. refraction ‐ the when?, the why?, and the when not? When light enters water, it cannot move as fast as it does in air. Place the paper behind the glass and watch as the arrow points the other way. For a really thin bag, use a plastic bag from the produce section of the grocery store. Good luck, and keep experimenting. When these light rays travel through air, they experience little or no refraction. Since many of these experiments use water, I would recommend having some of them (especially the rising coin) inside of a big tub. 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