An alien on shore observes a neutrally-buoyant object (orange) in the water. The angle subtended by the refracted rays at the alien's eye is shown in yellow. The apparent position of the object is shown ..
An observer at upper right views a neutrally-buoyant object (orange) in the water. The angle subtended by the refracted rays at the observer's eye is shown in yellow. The apparent position of the object is ..
The dispersion of white light by crown glass is modeled. The index of refraction ranges from 1.513 for red light to 1.532 for violet light. Playing the animation will decrease the angle of incidence in 1 degree increments.
The red line at y = 0 represents a boundary between media of different indices of refraction. The path of a light ray is shown in blue. Playing the applet forward or backwards will increase or decrease ..
The blue and gray areas represent different media. Incident, reflected, and refracted light rays in the media are shown. In which medium is the speed of light greater? How do you know?
Run the applet ..
Plane waves of constant frequency move up the screen, crossing from one medium (blue) into another (gray). The wave speed decreases in the upper medium. Since the frequency is constant and speed = frequency x wavelength, ..