That lake is not glowing; your eyes are being tricked by geometry and optics. Across the surface, tiny ripples tilt millions of water facets so that only a narrow set of angles satisfies the law of reflection and sends sunlight directly toward you, while most other directions stay comparatively dark and cold.
What looks like inner fire is really a tight contract between solar position and surface roughness. Low sun means shallow incidence angles; that boosts specular reflection under the Fresnel equations, which govern how light reflects and refracts at an interface. Each ripple crest acts as a shifting mirror normal, so the so‑called glitter path is just a moving corridor where angle of incidence equals angle of reflection, confined to your personal line of sight.
The glow feels volumetric, almost three‑dimensional, because your brain misreads dense point sources as depth. Add winter air: fine ice crystals and aerosols scatter shorter wavelengths, letting longer, golden wavelengths dominate the beam that hits the water, then you. No photon starts inside the lake. Every one is bounced, filtered, and aimed by wave physics and atmospheric optics until the surface impersonates its own light source.
