PHY 102 Lecture Notes - Lecture 6: Optical Instrument, Binoculars, Angular Distance
Document Summary
If the sign (wt kx) is negative = wave propagates in the +x direction (to the right) If the sign (wt + kx) is positive = wave propagates in the +x direction (to the left) Assumes angle is very small and thus, sin = tan . If y = distance between the screen and the central interference fringe (m=0 for the bright fringe) and l = distance between the screen and slit, then tan = y/l. For maxima of interference (light fringe: dsin = m sin = m /d and using small angle approximation , y = lm /d. For minima (dark fringe: dsin = (m + ) = y/l, y = l (m+ ) /d. When light passes through a hole, it spreads out. Shadows cast by illuminated objects have no sharp boundaries. Diffraction patterns = fuzzy region between light/dark edges of a shadow.
