These types of experiment were first performed by Thomas Young in 1801, as a demonstration of the wave behavior of light. The double-slit experiments are direct demonstration of wave phenomena via observed interference. Two slits are illuminated by a plane light waves. Louis Victor Pierre Raymond de Broglie was a French physicist whose work was key to the scientific gains made the first half of the 20th century, a time of unprecedented discovery. Each slit then becomes a point source for spherical waves that subsequently interfere with each other, giving rise to the light and dark fringes on the screen at the right. Here, light as waves (pictured as waves in a plane parallel to the double slit apparatus) impinge on the two slits. A simple illustration of light diffraction is the Young double slit experiment (Figure 1.7.1 Louis de Broglie ( 15 August 1892 19 March 1987) was a French physicist became a Nobel laureate in 1929 for his theory on waveparticle duality. This is, in fact, how holography works (the interference pattern is created by allowing the diffracted light to interfere with the original beam so that the hologram can be viewed by shining the original beam on the image). The actual state of our knowledge is always provisional and there must be, beyond what is actually known, immense new regions to discover. It is well-known that light has the ability to diffract around objects in its path, leading to an interference pattern that is particular to the object. Diffraction patterns are obtained if the wavelength is comparable to the spacing between scattering centers.ĭiffraction occurs when waves encounter obstacles whose size is comparable with its wavelength.Ĭontinuing with our analysis of experiments that lead to the new quantum theory, we now look at the phenomenon of electron diffraction. These diffraction patterns are characteristic of wave-like behavior and are exhibited by both matter (e.g., electrons and neutrons) and electromagnetic radiation. The interference pattern was just like that produced when water waves pass through two holes in a barrier to generate separate wave fronts that combine and interfere with each other. In these experiments it was found that electrons were scattered from atoms in a crystal and that these scattered electrons produced an interference pattern. The validity of de Broglie’s proposal was confirmed by electron diffraction experiments of G.P. Louis de Broglie was the first physicist to theorize that all matter exhibited the quantum ability to act like solid matter or wave, and in the mid-1900s, Clinton Davisson and Lester Germer found.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |