32 In the double-slit experiment of Fig. 35-10, the electric
fields of the waves arriving at point P are given by
$E_1 = (2.00 \mu V/m) \sin[(1.26 \times 10^{15}t)]$
$E_2 = (2.00 \mu V/m) \sin[(1.26 \times 10^{15}t) + 39.6 \text{ rad}].$
where time t is in seconds. (a) What is the amplitude of the resultant
electric field at point P? (b) What is the ratio of the intensity I at
point P to the intensity $I_{on}$ at the center of the interference pat-
tern? (c) Describe where point P is in the interference pattern by
giving the maximum or minimum on which it lies, or the maximum
and minimum between which it lies. In a phasor diagram of the
electric fields, (d) at what rate would the phasors rotate around the
origin and (e) what is the angle between the phasors?
so that the film thickness HIL
in fully constructive interference shift toward
wavelengths?
39 ILW Light of wavelength 624 nm is incident
on a soap film ($n = 1.33$) suspended in air. What are
and (b) second least thicknesses of the film if the
tions from the film undergo fully constructive
**40 A thin film of acetone ($n = 1.25$) coats
($n = 1.50$). White light is incident normal to the
tions, fully destructive interference occurs
constructive interference at 700 nm. Calculate
acetone film.
**41 through 52 43,51 SSM 47,51
