The enhancement of the scattered light signal due to the mixing of two optical beams in a plasma has been observed. The two beams are produced in a dual-cavity organic dye laser pumped by a Q-switched ruby laser. The plasma is generated by a Helium plasma jet. In normal scattering a distinct satellite is observed on either side of the incident ruby wavelength 6943Å. The presence of enhanced oscillations is demonstrated by a significant increase in the intensity of one of these satellites when the dye lasers are tuned such that the difference in their frequencies is equal to the normally-observed resonant frequency of the plasma. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

It is shown that light emitted by mercury vapour at 253.7 nm can be polarized by passing the light through mercury absorption gas embedded in a magnetic field which is transverse to the direction of propagation of the light. The absorption lines of the mercury are split by the Zeeman effect, so that the absorber has an absorption coefficient which depends on both the polarization and wavelength of the transmitted light. A complete theory for the Hg²⁰² isotope is presented and the results are compared to measurements made with a natural mercury emitter and absorber. The observations are in qualitative agreement with the theory once isotope and hyperfine structure of the isotopes in natural mercury are included in the theory. Quantitative analysis was not possible because the emission line profiles could not be measured with the available equipment. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

This thesis proves that it is possible in principle to make in line optical fibre polarizers from tapered optical fibres surrounded by a quartz cladding. The theory of light propagation and polarization in fibres was reviewed as background information and several fabrication processes were evaluated and tried experimentally. The best results are obtained by heating a quartz tube in an oxy-propane flame, so that it collapses onto the fibre. Unfortunately, due to residues remaining between fibre and quartz tube, and due to large differences in melting points the results are quite irreproducible, and routine fabrication of polarizers with predictable properties is not yet feasible by the methods described in this thesis. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

Within the world we occupy, light fills the void between source and object. Light becomes a primary catalyst for the way we negotiate the physical world. The physical world is experienced through events, and the order of events establishes our perception of time. Through light's material traits, it is able to alter the events that occur in space. These material characteristics are atmosphere, color, intensity, and presence. Light tangentially affects memory creation because perception of time requires the function of memory. In addition, light is able to engage memory through spatial manipulation. By manipulating the specific light environment of a space, a viewer can recall other memories to further integrate the current experience with past events. / 0 / SPK / specialcollections@tulane.edu

The diploma thesis includes design of smart child lighting that takes into account the effects of colour spectrum changes on the human sleep regime.

This thesis topic is focused on the experience of entering and revealing architecture. An entrance is not solely about the physical form of a door, rather it is the beginning of a building; a conversation between public and private, light and dark, safety and danger. The entrance is also a threshold for smell, texture, sound, light, and color. It is the preface of a poem that will lead you to fall in love with the rhythm of the building. It is where beauty begins and never ends. / Master of Architecture

I have lived in Kyoto for 6 months. During the 6 months, I was intrigued by the Bushido spirit in Kyoto, the core of Bushido is the social stratification and honor unto death. I would like to use the architecture language to demonstrate the Samurai Culture. Earth, Water, Fire, and Air are the elements that I want to consider. When the sword cut into the water, the water stopped for a while, and then it continued flowing, so I made a "Z" shape cut into the earth. I hope there is only a little light in the bottom of the museum. When the glimmer falls on the sword, the beauty of the sword will brighten up the dark room. / Master of Architecture

The object of this research was to develop a technique that could measure the velocity of light indirectly, with some degree of accuracy; yet could be used to demonstrate the physical fact of this velocity of light to groups of students or interested observers.

No description available.

No description available.