11.3+Diffraction

IB Physics > Wave Phenomena
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DIFFRACTION
media type="custom" key="13527038" [|VIDEO OF DIFFRACTION EXPERIMENTS] AN APPLET WHICH DEMONSTRATES SINGLE SLIT DIFFRACTION: DIFFRACTION Diffraction can be understood with reference to Huygen's secondary wavelets or you can consider the different distances that rays diffracted by an object take.
 * STANDING WAVE || DOPPLER || DIFFRACTION || RESOLUTION || POLARISATION ||

[|DIFFRACTION PATTERN VARIABLES SIMULATION]

Sketch the variation with angle of diffraction of the relative intensity of light diffracted at a single slit.

Derive the formula θ = λ/b for the position of the first minimum of the diffraction pattern produced at a single slit.

On the diagram below, the path difference is λ/2 for a minimum. sinθ = λ/a. Using small angle approximation and IB notation, θ = λ/b



Solve problems involving single-slit diffraction.

OBSERVE DIFFRACTION IN WATER, SOUND AND LIGHT ON THIS SIMULATION: [|PHET Wave Interference simulation]