Domain: Engineering — Energy Engineering
Target concept: Black surfaces heat up faster and reach higher temperatures; white surfaces heat up more slowly and have lower temperatures.

Video generation prompt: The temperature changes of black and white metal plates are recorded using an infrared camera under the same light source.

Evaluation guide:
(i) Target concept: Radiative absorption-driven differential heating of identical materials differing only in surface color.
Minimum mechanism: Incident broadband light must be absorbed differentially based on spectral reflectance; black surface must have high absorptance (>0.8) and white surface low absorptance (<0.3) in the 400–2500 nm range; thermal mass and emissivity must be equivalent; no convective or conductive interference dominates.
(ii)Storyline: Frame 1: Static wide shot showing two adjacent metal plates (black left, white right) under off light source. Frame 2: Light source visibly activates (e.g., lamp glows, beam appears). Frame 3–10: Continuous infrared view, same framing, showing both plates warming: black plate false-color intensifies faster and reaches higher saturation than white plate, with no reversal, pause, or desynchronization. Perspective remains fixed; no object enters/exits; thermal evolution is monotonic and causally locked to light activation.

Manual:
Experimental Procedure
1. Place identical metal plates — one black, one white — side-by-side under a single light source.
2. Activate light source.
3. Record thermal response using infrared camera.
Observation of Experimental Phenomena
In the infrared view, the black plate shows progressively brighter/hotter false-color (e.g., red/yellow) than the white plate, which remains comparatively cooler (e.g., blue/green), and this contrast increases steadily over time.
Summary of Experimental Principles
Black surfaces absorb more visible and near-infrared radiation, converting it to heat more efficiently; white surfaces reflect more radiation, resulting in slower heating and lower equilibrium temperature.

Prompt Grounding rubric:
level_1: Neither a black metal plate nor a white metal plate appears anywhere in the video; or only one plate is shown and it is made of the wrong material (e.g., plastic, wood, or fabric); or the video never switches to an infrared/thermal camera view at all.
level_2: Both a black plate and a white plate appear, but at least one is not metal (e.g., painted cardboard, ceramic, or plastic); or the two plates are not placed side by side in the same scene; or the infrared camera view never appears, so only ordinary visible-light footage is shown.
level_3: A black metal plate and a white metal plate sit side by side in one scene under a shared light source, and the video does switch to an infrared false-color view, but the two plates are never shown together in that thermal view at the same time (e.g., the camera shows one plate, then cuts to the other).
level_4: A black metal plate and a white metal plate sit side by side under a shared light source, and a continuous infrared false-color view keeps both plates in frame together for the whole video; however, the color distinction is muddled (e.g., the 'black' plate reads as plain gray, or the 'white' plate reads as beige) or the shared light does not reach both plates equally (e.g., one plate sits in shadow while the other is lit).
level_5: An unmistakably black metal plate and an unmistakably white metal plate sit side by side, fully visible, under one shared light source (e.g., a lamp or sun-like beam), and a single continuous infrared false-color view shows both plates together in the same frame for the entire video, with no cuts, zooms, or camera-angle changes at any point.

Scientific and Causal Correctness rubric:
level_1: The infrared view shows no differential heating at all: the black and white plates display the same false-color intensity and pattern throughout; or the physics is inverted, with the white plate's false-color reading hotter than the black plate's at some point.
level_2: The false-color view does change over time, but the core physics is not established: the black and white plates intensify at the same rate with no visible gap between them, or the white plate outpaces the black plate at any moment, or one plate's false-color intensity is already rising before the light source is shown switching on.
level_3: The black plate's false-color intensity is visibly higher than the white plate's for most of the video and both show a rising trend, but the gap between them is not held steady (for example, the two readings drift back together or momentarily cross), or one plate's rise clearly starts well before the other's, even though both begin only after the light source is shown switching on.
level_4: The black plate's false-color intensity stays above the white plate's for the entire video, and both plates begin their rising trend in near-unison shortly after the light source is shown switching on; but a small imperfection remains, such as the black plate's false-color hue occasionally shifting (e.g., flickering from red to orange) without a matching intensity change, or the gap between the two plates briefly narrowing before widening again.
level_5: The black plate's false-color intensity is continuously and unmistakably higher than the white plate's from the instant the light source is shown switching on; both plates' false-color levels begin rising in the same moment; and the black-over-white gap only widens or holds steady, never narrowing, crossing, or matching, for the full duration.

Spatiotemporal Consistency rubric:
level_1: The black plate or the white plate vanishes from the frame and reappears elsewhere, or a plate visibly cracks or warps into a different shape, or the whole scene's brightness jumps abruptly with no visible cause (e.g., unrelated to the light source turning on).
level_2: A hand or object briefly crosses in front of one plate for more than a second, or the light source is shown switching on but neither plate's surrounding illumination changes at all, or the camera view jumps to a new angle or zoom level with no smooth pan or transition.
level_3: Both plates stay in place and intact, the light source stays on continuously once activated, and the infrared framing stays consistent; but a slight overall shake affects the whole scene equally, or the shadow cast by one plate swings to a different side partway through the video even though the light source itself never moves.
level_4: Both plates hold their exact positions and shapes, the light source's illumination brightens gradually and smoothly as it switches on, and the infrared view shows no shake, no blocking object, and no camera-angle change; but the outline of one plate flickers or shimmers in the false-color view even though the plate itself is not moving.
level_5: Both plates stay completely motionless with no visible shift, warp, or edge flicker for the entire video; the lamp's illumination ramps up smoothly with no sudden flash or step change and then holds steady at its full brightness for the rest of the video; each plate's cast shadow stays fixed on the same side the whole time even though the lamp itself never moves; and the infrared framing, composition, and false-color palette remain steady with no shake, no blocking object, and no camera-angle change from start to finish.