Diffraction at circular apertures

Principle

Diffraction from circular diffraction objects must produce diffraction patterns in the form of concentric circles. Students should be able to anticipate this result an the basis of their knowledge of diffraction from a narrow slit or obstacle gained in previous experiments. Thus, they should use this experiment to verify and confirm their assumptions.

Benefits

• Multifunctional light box - All-in-one: Can be used for geometric optics on the table, colour mixing and on an optical bench
• Extension with others sets at anytime, no additional light sources needed, recognition value for students

Tasks

Investigate the interference patterns created when light is diffracted from a circular opening of small diameter, and on the basis of these patterns work out the wavelength of red light.