Act I — wavelength → photon energy
Act II — lens curves → focal point
Act III — mirrors array → ignition
Act IV — heliostat field → megawatts
Same photon. Redirected at scale.
Photon energy E(eV) ≈ 1240 / λ(nm) — Planck–Einstein (hc ≈ 1240 eV·nm). Glass index vs. wavelength follows a Cauchy-style dispersion approximation.