The views expressed in the project do not necessarily reflect the views of The Office for Learning and Teaching. Support for this project website has been provided by The Office for Learning and Teaching, which is part of the Department of Industry, Innovation, Science, Research and Tertiary Education. Single slit diffraction, diffraction gratings.ĭownloads (thumbnails at 50% of size of animation) Recreating a hologram: coherence beam and hologram plate. X-ray diffraction.įorming a hologram: beam splitter, object and reference beams, interference at the film. Diffraction requires wavelengths less than 0.1 nm. The atomic lattice as a diffraction grating. When is the eye diffraction limited? The resolution of telescopes. Resolving two point sources: Rayleigh's criterion. Diffraction pattern from a circular aperture. Rayleigh criterion and the Airy disc: Aperture and resolutionĬircular apertures in optics. A modern recreation of Arago's experiment. The bright dot at the centre of the shadow: Poisson's argument against the wave nature of light. The hydrogen spectrum and the origins of quantum mechanics. Experiment with diffraction through elliptical, rectangular, or irregular apertures. Put up a barrier to explore single-slit diffraction and double-slit interference. Although this is a mathematical idea, this topic has many practical, hands-on activities once you begin to discuss the consequences of superposition (diffraction and interference effects). Make waves with a dripping faucet, audio speaker, or laser Add a second source to create an interference pattern. Continuous spectra and line spectra, absorption and emission spectra. Waves add together by superposition that is, when two or more waves meet, the resultant is the algebraic sum of their displacements. Young's experiment with finite slit width: I q shows both interference and diffraction effects.Ī light-hearted discussion to illustrate why we don't notice quantum interference in everyday life.Īdding phasors with 2, 3, 4 and many slits: Diffraction gratings. This implies that each air particle is a sound. Rather, the sound waves of the radio cause longitudinal vibrations in the air in the entryway. The music from the radio can be audible directly in front of the entrance without diffraction. Diffraction occurs in all waves, not only sound waves. The emitted waves are semicircular, and occur at t, time later. Each point on the wavefront emits a wave at speed, v. where s is the distance, v is the propagation speed, and t is time. The principle can be shown with the equation below: s vt (26.2.1) (26.2.1) s v t. Young's experiment with finite slits.ĭiffraction from a single slit:Huygens' construction. Diffraction is the term for the bending of a wave. Figure 1 shows a simple example of the Huygens’s Principle of diffraction. X-ray, neutron and electron diffractionĭiffraction from a single slit. Shadows and beams with water waves of short wavelength. Using our optical schlieren system, the reflection, diffraction of an ultrasonic wave can be demonstrated easily and the sound velocity can be measured accurately. Diffraction, shadows, beams, Huygens' construction.ĭiffraction of light and sound.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |