Optics
3 terms
Laser
Optics
W (or J)
Light Amplification by Stimulated Emission of Radiation—a device producing coherent, monochromatic, highly directional, high-intensity light.
E = h ν, Population Inversion N2 > N1
Lens Maker's Formula
Optics
m⁻¹ (Diopters)
An equation relating a thin lens's focal length to its material refractive index and the radii of curvature of its two spherical surfaces.
1/f = (n - 1) [ (1/R1) - (1/R2) ]
Luminous Flux
Optics
Lumens (lm)
A photometric quantity measuring total perceived power of light emitted by a source, weighted by human eye spectral sensitivity.
Φ_v = 683 ∫ P(λ) V(λ) dλ