A floating picture beyond a lens can look equally convincing whether it is meant to be a projected image or an apparent image seen by an observer. The animation's visual polish cannot resolve that ambiguity. A buyer commissioning an optical explanation should settle what the image location means before approving a luminous miniature object in space.
OpenStax distinguishes real images that can be projected onto a screen from virtual images that cannot be projected in that way. Its converging-lens examples show that the configuration matters. This is the narrow scientific distinction used here, not a lens prescription or an assessment of a commercial imaging system.
Give the screen and observer different jobs
Start with a sketch that identifies the object, lens and relevant observation arrangement. If a screen is part of the intended demonstration, show its role clearly. If the diagram represents an observer's apparent image location, do not quietly give that location the same treatment as a physical projection surface.
Line styles can help distinguish actual paths from explanatory extensions, but only if the convention is approved and legible. A dashed line is not self-explanatory to every business audience. Add a short key rather than assuming that viewers already know the classroom diagram.
An imagined product explanation
Suppose an optical supplier wants a sales introduction to two viewing arrangements. The first storyboard places a glowing object on both sides of a lens in successive shots. There is no screen or observer, so the viewer sees a magic duplication rather than a meaningful comparison.
The revised treatment establishes the object once and introduces the two arrangements separately. One frame identifies a projection surface; the other makes the viewing relationship explicit. The audience is not asked to infer the distinction from whether the illustration happens to be upright or inverted.
This approach also gives the salesperson a clear boundary. The film introduces how to read the two image descriptions; it does not tell the buyer which lens to order for an unspecified installation.
Avoid a misleading physical prop
A rendered miniature sitting at a virtual image location may suggest that light or matter forms an independently visible object there. Decide whether a ghosted outline, labelled location marker or another approved convention communicates the intended idea more honestly. The aim is not to make the concept dull, but to avoid making the wrong object tangible.
If real footage accompanies the diagram, the technical owner should establish the arrangement and interpretation. Do not ask a production crew to improvise an optical experiment from a conceptual storyboard. Demonstration planning and any equipment-specific precautions belong to the responsible specialists.
Review the two frames without their section titles. Can someone identify where a screen belongs and where the observer belongs? Can they tell a physical component from an explanatory location marker? Keep those cues in any cropped version used on a product page. A clear real-versus-virtual explanation depends on the observation relationship, not on how convincingly the animation makes an image hover in empty space.
Source and enquiry
OpenStax: Image Formation by Lenses supports the narrow optical distinction described here. The review method and fictional example are original editorial guidance, not an optical design specification. Prepared with AI assistance as an unpublished draft.
Discuss the film and the optical explanation with Live Images. Optical engineering and laboratory demonstrations need their own agreed specialist scope.