Which Lighting Instrument is Adapted from Nineteenth-Century Lighthouses?
The Fresnel Spotlight
Explanation:
The lighting instrument that was adapted from the lens created for nineteenth-century lighthouses and that is used to create beams of light with soft edges is a Fresnel spotlight. This type of spotlight utilizes a convex lens to direct a beam of light. Just as the light from a lighthouse was created by placing a small light source at the focal point of a convex lens, the Fresnel spotlight works on the same principle. The light source is placed at the focal point, and the convex lens allows the emerging light to come out as parallel rays. The design of the Fresnel lens, which is more stepped and truncated than a simple convex lens, allows for the creation of a light beam with softer edges.
Which of the following lighting instruments is adapted from the lens created for nineteenth-century lighthouses and is used to create beams of light with soft edges? A. A PAR lamp B. A scoop C. A Fresnel spotlight D. An ellipsoidal spotlight Final answer: The Fresnel spotlight, using a lens design adapted from nineteenth-century lighthouses, creates beams of light with soft edges.