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Optics

Thin Lens Applet  
This applet illustates the image produced by a concave/convex lenses.
Submitted: Nov 05, 1999
Matopt- a program to calculate the matrix of an optical system  
The program "matopt" calculates the matrix connecting the vertices of an optical system and finds the principal points, focal points, and focal lengths. The Liberty Basic version reads easily (it uses "input" commands), but has no graphic output.
Submitted: Nov 06, 1999
Thin Lens Combinations  
This java applet lets you understand the entire range of behavior of a single convex lens or image formed by two lens.
Submitted: Nov 05, 1999
The Transmission of Wave through Dense media  
This applet demonstrates the transmission of a wave through dense media - reflection and refraction.
Submitted: Nov 05, 1999
Converging Lens  
This applet shows: two arrows, a converging lens, and rays of light being emmitted by the red arrow. The red arrow is the object, while the green arrow is the image that results after the rays have passed through the lens. The applet also displays two focus shown as blue dots.
Submitted: Nov 05, 1999
Refraction of Light  
This is a demonstration of the refraction of light.
Submitted: Nov 05, 1999
Thick Lens  
The radius of curvature on the left side of the lens, the radius of curvature of the right of the lens, the refractive index of glass (n) can be changed in the scroll bar which is on the right. The value of the refractive index of glass is displayed in the upper part of the scroll bar.
Submitted: Nov 05, 1999
Reflection from a film-covered surface  
There are two examples that deal with films whose thickness is 3/4 of the wavelength of light in the film. This thickness is chosen to simplify the algebra: the cosines make the diagonal matrix elements zero, and the sines in the off-diagonal elements are replaced by -1. The first example considers a film of index 2 on a substrate of index 1.5.
Submitted: Nov 06, 1999
Rainbow  
This applet illustrates the physics of a rainbow.
Submitted: Nov 05, 1999
Counter-Rotating Spirals Illusion  
This applet illustrates an optical illusion. The illusion is an example of the "Motion Aftereffect" phenomenon. Most people have probably experienced the motion aftereffect without knowing that there is a name for it. This effect was described in the early 19th century by R. Addams who found that he could get a strong motion aftereffect by staring at a waterfall for several seconds then shifting his gaze to something else. The illusion is sometimes called the "waterfall effect".
Submitted: Nov 09, 1999
Diverging Mirror  
This applet shows the basics of the Convex Mirror.
Submitted: Nov 05, 1999
Reflection from a bare surface  
This is the familiar result that tells us that light has its amplitude reduced by a factor of 5 and its phase changed by 180° when it is reflected from glass. The example below shows a wave incident from a medium with n = 1 striking the surface of a dielectric with n = 2.
Submitted: Nov 06, 1999
Reflection from wells and barriers  
This applet calculates the amplitude of the transmitted wave and plot it as a function of the square of the k ratio.
Submitted: Nov 06, 1999
Additive Color  
This applet illustrates an additive color (you can change red, green, blue and view the color).
Submitted: Nov 05, 1999
Animated Necker Cube  
This Java applet illustrates Mark Newbold's Animated Necker Cube.
Submitted: Nov 09, 1999
Diverging Lens  
This applet shows: two arrows, a diverging lens, and rays of light being emmitted by the red arrow. The red arrow is the object, while the gray arrow is the virtual image that results after the rays have passed through the lens. The applet also displays two focus shown as blue dots.
Submitted: Nov 05, 1999



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