A beam of monochromatic light is split, and the two parts
arrive at a point on a screen, having traveled paths that differ by
a distance of 3.5 l. Do these beams
interfere constructively or destructively?
destructively
constructively
neither
An interference pattern of light of
wavelength l1 due to a double slit forms
on a screen. The light source is changed out for light of
wavelength l2 and the first dark
fringe changes its position from y to
1/3 y. What is the relationship
of l1
to l2 ?
l1 =
3 l2
l1 =
1/3 l2
l1 =
2/3 l2
In Young's double slit experiment, a laser shines on a pair of
slits, onto a screen. If the slits get closer together, what
happens to the pattern on the screen?
It spreads out
it gets closer together
it gets brighter
nothing
Light strikes a soap bubble (soap has a higher index of
refraction than air). Some light reflects off the outer
surface, some light is refracted into the soap and reflects off the
inner surface of the soap. On which surface does a phase change
occur in the reflection of the light?
The outer surface
The inner surface
neither surface
both surfaces
Light in air (n = 1) strikes a thin film of oil (n = 1.4) on
water (n = 1.33). Which n should be used
in the thin film equation?
1.4
1.33
1
the average of all of them