PHYSICS OF LIGHT AND COLOR

Useful Relations

c = ln Speed of light, c = 3 x 10⁸ m/sec.

E = hn Planck's constant, h = 6.7 x 10^‑34 joule‑sec

I & A² Intensity

q₁ = q₁' Reflection

n₁sin q₁ = n₂sin q₂ n = c/v Refraction

(1/s) + (1/i) = (1/f) lens equation

M = (h_i/h_s) = i/s magnification

M_T = f_o/f_e telescope

M_M = 450/(f_of_e) microscope

d (diopter) = 1/f (meters) optical power

f_e = sT⁴ (s = 6 x 10^‑8 w/m²K⁴) Radiant Flux

E_v = I_v/s² illuminance

f_v = 683V_lf_e luminous/radiant flux

^oF = (9/5)^oC + 32^o T(K)=T(^oC+273^o) temperature conversion

f/ = (f/D) "f" Number

l = a(y/x)

Diffraction

Hue l(nm)

red 700

orange 650

y

yellow 600

a

green 550

x

blue 450

violet 400