# Reflectance curve for bare, recoated silver mirrors # Source: A. N. Wilson "Reflecting Telescope Optics II", p426 # Wavelength (nm) Reflectance (%) 220 28.0 240 29.5 260 29.2 280 25.2 300 17.6 315 5.5 320 8.9 340 72.9 360 88.2 380 92.8 400 95.6 450 97.1 500 97.9 550 98.3 600 98.6 650 98.8 700 98.9 750 99.1 800 99.2 850 99.2 900 99.3 950 99.3 1000 99.4 1500 99.4 2000 99.4 3000 99.4 4000 99.4 5000 99.5 6000 99.5 7000 99.5 8000 99.5 9000 99.5 10000 99.5 15000 99.6 20000 99.6 30000 99.6