Explore how the eye and brain interpret a series of pictures as motion by building a spinning motion picture show from a paper plate.

At this site see a dot fade away in this on-line experiment. Learn why this happens in "What's Going On?"

At this site see the effects our brains have on what we see when we view a picture upside-down.

Plans for building a 3-D cube illusion. Useful for projects on perception and vision.

Plans for building a 3-D triangle with seemingly impossible structure. Good for projects and presentations.

Discover what controls how fast tiny molecular motors in our body pull through a single strand of DNA. How hard can the motor pull in a tug of war with the optical tweezers? Discover what helps it pull harder. Do all molecular motors...

Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA...

Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched.

This highly informative site delves into salinity, pressure, density, temperature acoustics, and optics associated with ocean water. A quick quiz follows the information presented.

The FOM Institute for Atomic and Molecular Physics (AMOLF) is one of the five national research institutes of the Foundation for Fundamental Research on Matter (FOM). The research at AMOLF is focused on selected areas of atomic,...

This article from Khan Academy provides information about refraction and light bending. This information is intended for the Class 12 Physics Course (India).

Presents explanation of local color.

Provides a discussion of curved mirrors and ray diagrams. Shows and explains the process of drawing a ray diagram to determine the image location, size, and orientation.

Florida State University offers an interactive Java applet demonstrating the object-image relationships for a concave mirror. The position of the object can be dragged along the principal axis and the location, orientation, and size of...

Learn about the human body's own "camera" as you explore the inner workings of the human eye. This resource is displayed as a three-dimensional, interactive animation.

A seven-lesson unit where students learn the concepts of refraction and interference in order to solve this engineering challenge: In 2013, actress Angelina Jolie underwent a double mastectomy, not because she had been diagnosed with...

At this site from The Nobel Foundation you can read about the scientist who won the Nobel Prize in Physics in 1907, Albert A. Michelson (1852-1931 CE). Here, you can read a detailed biography which provides information on Michelson's...

A discussion of the lens-maker's formula and its use in determining the effect of lens shape and index of refraction upon the magnifying power of a lens. Includes an interactive problem-solving section.

The meaning and cause of refraction--as well as Snell's law of refraction--are discussed. Includes an interactive problem-solving form in which visitors relate angles of refraction to the incident angle and the indices of refraction.

The phenomenon of light dispersion is explained with a formula and a practice form for calculating Abbe's number.

An online version of articles and activities from the Exploratorium Magazine, Vol. 23, No. 3. This issue looked at how we are able to examine the inside of the human body, what kinds of technology are used, and how each of them is used...

Site entitled "Cranial Nerves." Links to other sites.

Some molecules can be either left- or right-"handed." The left- and right-handed molecules have the same number and type of atoms, and their chemical structures look identical, but they are actually mirror images of each other. Many...

Several pages with an interesting discussion of the visible light spectrum and atomic absorption and emission line spectrum. Features excellent graphics, thorough and understandable discussion, and many interactive Java applets.