wave optics

Cards (16)

Wave front: locus of points where all points have same phase of oscillation
Intensity directly proportional to square of amplitude AND INVERSELY PROPORTIONAL TO RADIUS
Two waves superimpose in same phase(cos0) resultant amplitude and intensity increase
A= (a1 + a2)
Two waves superimpose in opposite phase (cos180) resultant amplitude and intensity decreases
A = (a1 - a2)
Intensity of light maximum- constructive interference
Intensity of light minimum- destructive interference
Interference obeys law of conservation of energy
In YDSE sodium lamp is used as source of light
Angular fringe width is independent of distance between plane of slit and screen
Intensity of bright spot = 4a^2
Intensity of dark spot= 0
width of central maxima is double of secondary maxima
if d decreases secondary maxima get wider
With each successive maxima intensity decreases
On changing medium fringe width changes
White source of light produces unsustain interference of light
If white source of light used then at center white bright spot surrounded by coloured fringes