This online exhibit is a visual illusion in which a fuzzy blue dot disappears into a green background. The illusion is created by the tiny jittering movements that your eyes are continually making. Take your investigation further by making your own hands-on fading dot illusion - instructions are at the Exploratorium Snack website (see related link).

This activity is an interactive “out-of-the-seat” demo that allows the students to become involved in learning about fibre optic cables by imitating the way that one basically functions. While enjoying the physicality of the demo the children will pick up basic details of light, reflection, optical properties, and applications to technology. Additionally, the activity will go into details of how fibre optics are used in astronomy technology and how it is used to improve our understanding of the universe. An emphasis should be placed on asking direct questions to the children about how these concepts can influence technology, astronomy, and our world to reinforce the concepts that they are learning about.

The formation of images by plane and spherical mirrors will be studied by examining paintings done by several masters which include images formed in mirrors.

This is a continuation of Fundamentals of Physics, I (PHYS 200), the introductory course on the principles and methods of physics for students who have good preparation in physics and mathematics. This course covers electricity, magnetism, optics and quantum mechanics.

How does a lens form an image? See how light rays are refracted by a lens. Watch how the image changes when you adjust the focal length of the lens, move the object, move the lens, or move the screen.

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair. A large Fresnel lens creates upside-down images of distant objects and right-side-up images of nearby objects. Learners can locate the upside-down images by using a piece of white paper as a screen. The right-side-up images are harder to find. Activity includes detailed explanations and diagrams to explain how the images are created.

This manual provides simple demonstrations to show how lenses and mirrors are used to create telescopes. It was created for use by the Night Sky Network of astronomy clubs.

In this Exploration Routine, students learn how to most effectively use their hand lenses. They practice finding the “sweet spot” – the distance to hold the lens between eye and object so the object comes into focus. Without this introduction, students may become frustrated or distracted by hand lenses because they don’t understand how to use them. With this quick activity, students develop a healthy fascination with this transformational tool and feel empowered to use it like a scientist. This activity is also an opportunity to invite your students into inquiry. By modeling how to use a lens, how to say observations out loud, and by encouraging students to check things out and share discoveries, you can begin to set a tone of collaborative inquiry for your group.

Students learn the basic relationship of Snell's Law, practice applying it to a situation, then are given another situation where it "doesn't work."??? This situation turns out to be one in which total internal reflection occurs. Students are then shown what happens with classroom apparatus.

In this video segment adapted from NASA, astronomer Michelle Thaller introduces the world of infrared light and demonstrates how infrared cameras allow us to see more than what the naked eye can perceive.

In this course, the student will first learn about waves and oscillations in extended objects using classical mechanics. The course will then examine the sources and laws that govern static electricity and magnetism. A brief look at electrical measurements and circuits will help establish how electromagnetic effects are observed, measured, and applied. These topics lead to an examination of how Maxwell's equations unify electric and magnetic effects and how the solutions to Maxwell's equations describe electromagnetic radiation, which will serve as the basis for understanding all electromagnetic radiation, from very low frequency radiation emitted by power transmission lines to the most powerful astrophysical gamma rays. The course also investigates optics and launches a brief overview of Einstein's special theory of relativity. A basic knowledge of calculus is assumed. (Physics 102; See also: Biology 110, Chemistry 002, Mechanical Engineering 006)

This is a short unit (including hands on activities) to expand our study of how light travels and how it behaves when it hits an object.

This activity is lab oriented where students will observe that light travels in a straight line and is reflected, redirected, absorbed, or passes through objects.

This activity is an investigation of what colors make up white light. Students will explore through two different hands-on activities.

Physics Laboratory mannual of UG students having experimental details on electromagnetism,electricity,optics and modern physics.

Create a laser by pumping the chamber with a photon beam. Manage the energy states of the laser's atoms to control its output.

This activity is an experiment where students learn about angles of reflection and use that knowledge to reflect a light beam around obstacles to a target across the classroom.

A unit on wave phenomena, and its applications to detecting and evaluating extrasolar planets, and lighting and sound design in theatrical productions. The unit is designed for a high school physics class, but could be modified for physical science, astronomy, technical theater, or the middle school level.

A magical demonstration where a Pyrex tube vanishes in a beaker of mineral oil. Useful demonstration to introduce to concept of refraction (and/or partial reflection).

This activity is an introduction to a magnifying glass as a science tool.