Grade: High School - 5

PII.9.5
Develop graphical and mathematical representations that describe the relationship between the wavelength of monochromatic light, spacing between slits, distance to screen, and interference pattern produced for a double-slit scenario and apply those representations to qualitatively and quantitatively describe how changing any of the independent variables affects the position of the bright fringes.

I Can Statements Academic Vocabulary
* I can develop graphical and mathematical representations that describe the relationship between the wavelength of monochromatic light, spacing between slits, distance to screen, and interference pattern produced for a double-slit scenario.
* I can apply those representations to qualitatively describe how changing any of the independent variables affects the position of the bright fringes.
* I can apply those representations to quantitatively describe how changing any of the independent variables affects the position of the bright fringes.

Wavelength
Monochromatic Light
Slits
Screen
Interference Pattern
Double-Slit
Fringes

Cross Cutting Concepts
Energy and Matter
Cause and Effect
Looking Back Looking Ahead
* Explain how electromagnetic waves interact with matter both as particles (i.e. photons) and as waves and be able to apply the most appropriate model to any particular scenario. (PII.9.2)

* Develop graphical and mathematical representations that describe the relationship between the frequency of a mechanical wave and the wavelength of the wave and apply those representations to qualitatively and quantitatively describe how changing the frequency of a mechanical wave affects the wavelength and vice versa. (PI.7.3)

* The student is able to predict the dependence of major features of a diffraction pattern (e.g., spacing between interference maxima), based upon the particle speed and de Broglie wavelength of electrons in an electron beam interacting with a crystal. (de Broglie wavelength need not be given, so students may need to obtain it.) [SP 6.4] (AP P2 LO 6.G.2.2)