Light: Just Flip It and Look You Will See

It is no surprise that we experience and use scientific phenomenons every day. But, did you know that our eyes do that too? At camp, we have a science experiment that demonstrates how our eyes take in light. This hole in the wall is a great model for an eye. Your eye has a few major components: cornea, lens, iris, pupil, retina, and macula, to name a few. For our purposes, let us focus on the iris and pupil. The pupil in an eye is basically just a hole. The iris is a muscle that can expand and contract to change the size of the pupil. The purpose of the pupil is to allow light to enter your eye.


light eyeLight, on Earth’s scale, travels in straight lines. So how does any of that light ever make it into your eyes for you to see the world around you? The key is reflection. Light bounces off of objects, and if it bounces just right, that information will make it all the way to you. However, the only light you will ever see are the rays that make it all the way through those tiny holes.

So why is the image that is formed upside down? Due to light traveling in straight lines, when the light that bounces off of someone’s head, that same information makes it through the hole. Any other reflection of light will slam into the wall, unable to pass along the data. Same thing goes for light bouncing off of someone’s feet. Because the light is entering through the small hole, it must intersect and thus the image is inverted. However, we don’t see the world upside down. Our brains have adapted to this phenomenon, and flips the images automatically! Our brains are amazing!

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Written By: Mimi Garai


We would like to thank you for visiting our blog. AstroCamp is a hands-on physical science program with an emphasis on astronomy and space exploration. Our classes and activities are designed to inspire students toward future success in their academic and personal pursuits. This blog is intended to provide you with up-to-date news and information about our camp programs, as well as current science and astronomical happenings. This blog has been created by our staff who have at least a Bachelors Degree in Physics or Astronomy, however it is not uncommon for them to have a Masters Degree or PhD. We encourage you to also follow us on Facebook, Instagram, Google+, Twitter, and Vine to see even more of our interesting science, space and astronomy information. Feel free to leave comments, questions, or share our blog with others. Please visit for additional information. Happy Reading!