AnswersCrowley Credit Recovery Physics BWave Properties

Diffraction Answers

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1
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Which is a tool used by scientists to determine the composition of objects?

A
a hologram
B
a spectrometer
C
a wave front
D
a prism
2
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Which is the destructive interference formula for diffraction grating problems?

A
dsin =
Option A
B
dcos =
Option B
C
dcos = n
Option C
D
dsin = n
Option D
3

The diagram shows a spectrometer being used to analyze a sample of a solution.

Question illustration
A
W
B
X
C
Y
D
Z
4

Which best describes what happens to sunlight after it passes through the keyhole of a door?

A
It converges into one particular shadow region.
B
It spreads out into multiple shadow regions.
C
It bends back toward the door.
D
It scatters back toward the door.
6

What causes diffraction that results in a fuzzy glow around a full moon?

A
Moonlight converges into a single area around the moon called a shadow region.
B
Moonlight bends toward a single area around the moon called a shadow region.
C
Light from the Sun reflecting off the moon bends around particles in Earth’s atmosphere and then spreads out.
D
Light from the Sun reflecting off the moon then reflects off particles in Earth’s atmosphere and scatters.
7

What is the approximate wavelength of a light whose first-order bright band forms a diffraction angle of 45.0° when it passes through a diffraction grating that has 500.0 lines per mm?

A
236 nm
B
353 nm
C
943 nm
D
1414 nm
8

What is the approximate wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes through a diffraction grating that has 250.0 lines per mm?

A
26 nm
B
32 nm
C
414 nm
D
518 nm

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