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lens that possesses at least one surface that curves inwards
Not able to see through it
Visible energy
a type of lighting fixture that utilizes a lamp
the angle that an incident line or ray makes with a perpendicular to the surface at the point of incidence
lines in which light may seem to stream from the sun or any luminous body
the angle made by a reflected ray with a perpendicular to the reflecting surface
Something not capable of producing light
a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass from the optic nerve to the brain
Something that can let some light pass through
the biochemical emission of light by living organisms
the distance between successive crests of a wave
the angle made by a refracted ray with a perpendicular to the refracting surface
Something that lets all light pass through
emitting light as a result of being heated
Phosphorescence is light emitted after exposure to radiation, or produced by something that doesn't produce flame or heat
the emission of light during a chemical reaction that does not produce significant quantities of heat
Something full of light
A lens where at least one side bends out
the strength and vitality required for sustained physical or mental activity