# Physics (Grades 9–12) Subtest 2

## Subarea II. Geometrical and Physical Optics

0013
Demonstrate knowledge of geometrical optics.

- describing the reflection, refraction, and transmission of light using Snell's law when light encounters a given object or a boundary between mediums having different indices of refraction
- describing the dispersion of light by a prism
- describing the location, types, and magnification of images formed by mirrors and lens systems using words, ray diagrams, and mathematical expressions
- designing a system of lenses and mirrors to produce a real or virtual image of a given magnification

0014
Demonstrate knowledge of physical optics.

- demonstrating knowledge of measurements and calculations used to determine the intensity and polarization of a given light source
- describing the transmission and absorption of light when it encounters a linear polarizer
- describing the interaction of monochromatic light with a given single slit, a pair of parallel slits, and with thin films
- applying the principle of superposition to a system of slits to explain and predict how changing the slit width, the slit separation, and the wavelength of the incident light affects the resulting light pattern