GPT Image Prompt
How to useCopy this prompt and paste it into ChatGPT, Gemini, Nano Banana, or your favorite AI image tool. Adjust details if needed.
Create a highly realistic vertical educational science poster explaining how a rainbow forms for primary school students. Integrate the title “HOW A RAINBOW FORMS” directly along the upper arc of a large rainbow, using clean white lettering that follows the curve. Do not place the title in a centered banner or add a subtitle.
Build the composition around one enormous transparent raindrop shown as a realistic scientific cutaway floating in the sky and occupying most of the poster. Use a diagonal reading flow from the upper left to the lower right. Begin with the Sun and a narrow beam of white light entering the raindrop from the upper left. Show the beam bending at the air-to-water boundary, separating into the visible spectrum, reflecting once from the inner back surface of the drop, and bending again as it exits toward the lower right. Make the optical path precise, continuous, and easy to follow so the science is understood through the light itself rather than through repeated cards or panels.
Place only four small numbered markers directly beside the light path: “1. LIGHT ENTERS” with “Sunlight enters a raindrop.”; “2. LIGHT BENDS” with “The light changes direction as it moves from air into water.”; “3. COLORS SEPARATE” with “Different colors bend by slightly different amounts.”; and “4. LIGHT LEAVES” with “After reflecting inside the drop, the colored light bends again as it exits.” Near the lower right, include a realistic observer viewpoint and a distant rainbow appearing opposite the Sun. Add one small curved note near the rainbow: “A rainbow is seen when sunlight, raindrops, and the observer are in the right positions.”
Show the visible spectrum in the correct order, with red on the outer edge, followed by orange, yellow, green, blue, indigo, and violet on the inner edge. Use photorealistic atmospheric science visualization, transparent optical materials, believable refraction, precise light paths, soft post-rain clouds, wet air, and natural sunlight. Set the scene against a dramatic pale-gray storm-clearing sky transitioning into bright blue, with the rainbow spectrum as the only highly saturated color element. Use compact museum-style scientific labels attached directly to the optical path, keeping all text minimal, large, and easy to read. Keep the science accurate: do not show a rainbow forming inside a cloud, do not imply that one raindrop creates a complete visible rainbow by itself, and avoid cartoon raindrops, faces, magical energy effects, pastel classroom styling, white card panels, rounded boxes, or decorative footer sections.