Optics
54 terms · page 3 of 3
Thin Film Interference
Optics
m
The interference phenomenon occurring when light waves reflected from the top and bottom boundaries of a thin transparent film superimpose.
2 n t cos θ = m λ (Constructive with phase shift)
Total Internal Reflection
Optics
Degrees (°)
The complete reflection of a light ray inside an optically denser medium when striking the boundary with a rarer medium at an angle exceeding the critical angle.
sin θ_c = n2 / n1 (where n1 > n2)
Tyndall Effect
Optics
N/A
The scattering of a light beam by colloidal particles or tiny suspended matter in a fine suspension or transparent medium.
N/A
Virtual Image
Optics
m
An optical image formed where light rays appear to diverge from, but do not actually intersect; cannot be projected on a screen.
v < 0 (for virtual image), m > 0 (upright)
Visual Angle
Optics
rad (or arcminutes ')
The angle subtended at the eye's nodal point by an object, determining the size of the image formed on the retina.
θ ≈ h / d (in radians for small angles)
Young's Double Slit Experiment
Optics
m
The classic experiment demonstrating wave-particle duality and wave nature of light via interference fringes produced by coherent light passing through two narrow parallel slits.
y_m = m λ D / d (Bright), y_m = (m + ½) λ D / d (Dark)