Light Crossword

an apparatus consisting of a tube attached to a set of mirrors or prisms, by which an observer (typically in a submerged submarine or behind a high obstacle) can see things that are otherwise out of sight.
an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.
a solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.
a piece of glass or other transparent material with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass) or with other lenses (as in a telescope).
a porous device for removing impurities or solid particles from a liquid or gas passed through it.
the throwing back by a body or surface of light, heat, or sound without absorbing it.
he fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
the action or process of distributing things or people over a wide area.
any of a group of colours from which all other colours can be obtained by mixing.
a colour resulting from the mixing of two primary colours.
a band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
he process or state of converging.
he process or state of diverging
vision using two eyes with overlapping fields of view, allowing good perception of depth.
convex mirror, diverging mirror, or fish eye mirror is a curved mirror in which the reflective surface bulges toward the light source. Convex mirrors reflect light outwards, therefore they are not used to focus light.
A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (bulging inward). Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices.
A real image is a reproduction of an object via light that can be formed on a surface. A real image exists regardless of whether an observer is present. One example is the image seen on a screen at a movie theater (in contrast, the image one sees in a flat mirror is not a real image, but rather a virtual image).
an optical image formed from the apparent divergence of light rays from a point, as opposed to an image formed from their actual divergence.
the point at which rays or waves meet after reflection or refraction, or the point from which diverging rays or waves appear to proceed
An incident ray is a ray of light that strikes a surface. The angle between this ray and the perpendicular or normal to the surface is the angle of incidence. The reflected ray corresponding to a given incident ray, is the ray that represents the light reflected by the surface.
conforming to a standard; usual, typical, or expected.
a layer at the back of the eyeball that contains cells sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.
the mucous membrane that covers the front of the eye and lines the inside of the eyelids.
the transparent layer forming the front of the eye.
each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye.
each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye.
the clear fluid filling the space in the front of the eyeball between the lens and the cornea.
a flat, coloured, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the centre.
a person who is taught by another, especially a schoolchild or student in relation to a teacher.
the point of entry of the optic nerve on the retina, insensitive to light.