Virtual reality (VR), as an emerging visualization technology, has introduced an unprecedented communication method for collaborative design. VR refers to an immersive, interactive, multisensory, viewer-centered, 3D computer-generated environment and the combination of technologies required to build such an environment. This article introduces the…

Many simple experiments can be performed in the classroom to explore the physics of vision. Students can learn of the two types of receptive cells (rods and cones), their distribution on the retina and the existence of the blind spot.

Provides a definition of vergence in terms of the curvature of the wave fronts, and gives examples to illustrate the advantages of this approach. The vergence treatment of geometrical optics provides both conceptual and algebraic advantages, particularly for the life science student, over the traditional object distance-image distance-focal length…

Using a box with a pinhole in one end, the diameter of the sun can be calculated with knowledge of the length of time required for the image of the sun to sweep out a measured arc. (CP)

Reports on the physical origins of spherical aberrations in axially symmetric electrostatic lenses to convey the essentials of electon optics to those who must think critically about the resolution of the electron microscope. (GS)

This textbook presents scientific knowledge in a question-and-answer format. It is intended for the use of families and schools, explains about 2000 questions that children commonly ask, and is written in language so plain as to be understood by all. Heat, non-metallic elements, metals, organic chemistry, meteorology, optics, and sound are covered.

The project described demonstrated not only the feasibility of producing a holographic compound spherical beamspliter mirror with full color response, but the performance and color capabilities of such a beamsplitter when incorporated into a Pancake Window Display system as a replacement for the classical glass spherical beamsplitter. This…

Provides tables and graphs that give a complete and simple picture of the relationships of image distance, object distance, and magnification in all formations of images by simple lenses and mirrors. (CP)

Presents a justification of the belief that science and art can be successfully combined. The computer's merits are viewed as a potential modelbuilder for the formalization of aesthetic concepts. The rest of the paper details recent and current research on such uses of the machine. (VT)

Describes how to construct a simple on-axis hologram designed to illustrate the reconstruction of images in terms of Fresnel zone plates and gratings. (GA)

Includes eleven short notes, comments and responses to comments on a variety of topics such as uncertainty in a least-squares fit, display of diffraction patterns, the dark night sky paradox, error in the dynamics of deformable bodies and relative velocities and the runner. (GA)

Reviews various science activities investigating polarized light. (SL)

Describes the rationale behind the construction of a private observatory by seven astronomers. Lists pertinent factors that should be considered in the creation of an observatory. (CP)

Describes an experimental arrangement for investigating optical barrier penetration. (SL)