Hailu Luo, Wei Hu, Xunong Yi, Haiying Liu, and Jing Zhu Laboratory of Light Transmission Optics, South China Normal University, Guangzhou 510630, China (Dated: June 8, 2006) Abstract It is found that the amphoteric refraction, i.e. the refraction can be either positive or negative depending on the incident angles, could occur at a planar interface associated with a uniaxially anisotropic positi...

Fermat’s principle applied to a flat metric in the plane yields the phase of a Bessel function in the periodic domain for a constant index of refraction. Gravitational forces cause the index of refraction to vary and lead to a modified phase of the Bessel function. A distinction is made between the forces that cause acceleration: the gravitational force affects the optical properties of the med...

Monodispersed spherical aerosols of 0.26-2-micro diameter with approximate range of indexes of refraction of atmospheric aerosols have been produced in the laboratory by atomization of liquids with a vibrating capillary. Integrated light scattered 8 through 38 degrees from the direction of forward scattering has been measured with a photoelectric particle counter and compared to Mie theory calc...

Newton corpuscular theory: According to Newton light energy propagates from one point to another in the form of particle. From the source of light very small tiny particles are emitted in all directions which travel with a tremendous speed 3 x 10 m/sec and when these corpuscles strike the retina of eye we feel the sensation of light. Newton attributed different colors to the different size of t...

We determine the Compton effect from the Volkov solution of the Dirac equation for a process in medium with the index of refraction n. Volkov solution involves the mass shift, or, the mass renormalization of an electron. We determine the modified Compton formula for the considered physical situation. The index of refraction causes that the wave lengths of the scattered photons are shorter for s...

We demonstrate subwavelength spatial resolution with a scanning microlens operating in collection mode with a large-area detector. Optical contrast is created by refraction of off-axis light rays at angles larger than the maximum collection angle. With a microfabricated silicon microlens 10 mm in diameter, we measure spatial resolution due to refraction contrast of l/4.3 at a wavelength of l510...

Current techniques of water wave visualisation such as shadowgraphy and stereophotography are widely used but are deficient in many aspects. Refraction based visualisation observes the bending of light as it traverses across a water wave -air interface. This work describes the continued development of techniques to measure the surface height of a liquid free surface. The method utilizes refract...

We experimentally address the wave-vector and polarization dependence of the internal conical refraction phenomenon by demonstrating that an input light beam of elliptical transverse profile refracts into two beams after passing along one of the optic axes of a biaxial crystal, i.e. it exhibits double refraction instead of refracting conically. Such double refraction is investigated by the inde...

Purpose To determine whether dopamine receptor D1 (D1R) signaling pathway activation by bright light (BL) in specific retinal neuronal cell types contributes to inhibiting form-deprivation myopia (FDM) in mice. Methods Mice (3-weeks old) were raised under either normal light (NL: 100-200 lux) or BL (2500-5000 lux) conditions with or without form deprivation. Refraction changes were evaluated ...