METRIC FLIGHT / RESEARCH HORIZON
Light → controlled motion
Recover a known photon force, then investigate whether programmable optical surfaces can control the direction of momentum transfer.

The first useful result.
Force consistent with measured optical momentum.
Start with a mirror of characterized reflectance and absorption. Measure power at the target, calibrate the balance, and vary pressure and thermal conditions.
What the evidence must distinguish.
A photon-force benchmark does not validate reactionless propulsion or spacetime engineering.
Predefine acceptance criteria and record calibration, controls and uncertainty. A result belongs to the system and conditions in which it was obtained.