WorksheetsDiffraction and Interference
Total questions: 30
Worksheet time: 24mins
What type of interference is represented in this diagram?
Constructive
Destructive
What type of interference is represented in the diagram?
Constructive
Destructive
What's happening at A?
Two crests are combining to create constructive interference.
A crest and a trough are combining to create destructive interference.
Two crests are combining to create destructive interference.
A crest and trough are combining to create constructive interference.
What is happening at B?
Two crests are combining to create constructive interference.
A crest and a trough are combining to create destructive interference.
Two crests are combining to create destructive interference.
A crest and a trough are combining to create constructive interference.
Interference effects observed in the early 1800s
were instrumental in supporting a concept of the
existence of which property of light?
Polarization
Particle nature
Wave nature
Electromagnetic character
The term coherence relates to ______.
the phase relationship between two waves
the polarization state of two waves
the diffraction of two waves
the amplitude of two waves
Which of the following figures represent is a double
slit interference pattern?
A
B
C
D
What does one observe on the screen in a Young's experiment if white light illuminates the double slit instead of light of a single wavelength?
A white central fringe and no other fringes
A dark central fringe and a series of alternating white and dark fringes on each side of the center
A white central fringe and a series of colored and dark fringes on each side of the center
A continuous band of colors with no dark fringes anywhere
In a Young's double slit experiment, green light is
incident on the two slits. The interference pattern is
observed on a screen. Which one of the following
changes would cause the fringes to be more closely
spaced?
Reduce the slit separation distance
Use red light instead of green light
Use blue light instead of green light
Move the screen farther away from the slits
Monochromatic coherent light shines through a
pair of slits. If the distance between these slits is
decreased, which of the following statements is/are
true of the resulting interference pattern?
I. The distance between the maxima stays the
same
II. The distance between the maxima decreases
III. The distance between the minima increases
IV. The distance between the maxima increases
I only
I and III only
II and III only
III and IV only
Monochromatic coherent light shines through a
pair of slits. If the wavelength of the light is
decreased, which of the following statements is/are
true of the resulting interference pattern?
I. The distance between the maxima stays the
same
II. The distance between the maxima decreases
III. The distance between the minima stays the
same
IV. The distance between the minima decreases.
I and III only
I and IV only
II and III only
II and IV only
In a double-slit interference experiment you are
asked to use laser light of different wavelengths and
determine the separation between adjacent maxima.
You observe that this separation is greatest when you
illuminate the double slit with _____.
blue light
green light
yellow light
red light
What do we mean when we say that two light
rays striking a screen are in phase with each other?
When the electric field due to one is a maximum, the electric field due to the other is also a maximum, and this relation is maintained as time passes
They are traveling at the same speed
They have the same wavelength
They alternately reinforce and cancel each other
Two light sources are said to be coherent if they are ______.
of the same frequency
of the same frequency, and maintain a constant phase difference
of the same amplitude, and maintain a constant phase difference
of the same frequency and amplitude
Two beams of coherent light start out at the same
point in phase and travel different paths to arrive at
point 𝑃. If the maximum constructive interference is
to occur at point 𝑃, the two beams must travel paths
that differ by _______.
a whole number of wavelengths
a whole number of half-wavelengths
an odd number of wavelengths
an odd number of half-wavelengths
Two beams of coherent light start out at the same
point in phase and travel different paths to arrive at
point 𝑃. If the maximum destructive interference is
to occur at point 𝑃, the two beams must travel paths
that differ by _______.
a whole number of wavelengths
a whole number of half-wavelengths
an odd number of wavelengths
an odd number of half-wavelengths
Which of the following statements is untrue when applied to Young's double slit pattern
The fringes are equally spaced
A bright fringe occurs when the waves arrive in phase
The sources must be coherent
The centre fringe is the brightest
Which diagram best represents the shape and direction of a series of wave fronts after they have passed through a small opening in a barrier?
It is shone through a double slit spacing 0.2mm onto a screen 2m away.
The fringe spacing is?
How many diffraction maxima will be seen in total
