Question 1

At what angle will the sixth order maximum occur for a wavelength of 447 nm using a diffraction grating with 7,250 lines per cm?

Accepted Answer

A)  30° 
B)  90° 
C)  No sixth order maximum will occur in this case. 
D)  1.57° 
E)  ​11.1° 
A)  30° 
B)  90° 
C)  No sixth order maximum will occur in this case. 
D)  1.57° 
E)  ​11.1°

Question 2

A Young's double-slit experiment is performed in air and then the apparatus is submerged in water.What happens to the fringe separation,and what can be used to explain the change,if any?

Accepted Answer

A)  The separation stays the as it is the same experiment independent of the medium. 
B)  The separation decreases because the frequency of the light decreases in the water. 
C)  The separation increases because the wavelength of the light increases in the water. 
D)  The separation decreases because the wavelength of the light decreases in the water. 
A)  The separation stays the as it is the same experiment independent of the medium. 
B)  The separation decreases because the frequency of the light decreases in the water. 
C)  The separation increases because the wavelength of the light increases in the water. 
D)  The separation decreases because the wavelength of the light decreases in the water.

Question 3

Two flat glass plates are in contact along one end and are separated by a sheet of tissue paper at the other end.A monochromatic source of wavelength 509 nm illuminates the top plate.If 11 dark bands are counted across the top plate,what is the paper thickness? (1 nm = 10−9 m)

Accepted Answer

A)  5.1 × 10−6 m 
B)  2.0 × 10−6 m 
C)  2.5 × 10−6 m 
D)  3.1 × 10−6 m 
E)  ​1.5 × 10−6 m 
A)  5.1 × 10−6 m 
B)  2.0 × 10−6 m 
C)  2.5 × 10−6 m 
D)  3.1 × 10−6 m 
E)  ​1.5 × 10−6 m

Question 4

What is the minimum thickness of a glycerin film (n = 1.47)on which light of wavelength 688 nm shines that results in constructive interference of the reflected light? Assume the film is surrounded front and back by air.

Accepted Answer

A)  234 nm 
B)  117 nm 
C)  253 nm 
D)  506 nm 
E)  ​126 nm 
A)  234 nm 
B)  117 nm 
C)  253 nm 
D)  506 nm 
E)  ​126 nm

Question 5

Unpolarized light is passed through polarizer 1.The light then goes though polarizer 2 with its plane of polarization at 30.7° to that of polarizer 1.What fraction of the intensity of the original light gets though the second polarizer?

Accepted Answer

A)  0.430 
B)  0.740 
C)  0.370 
D)  0.860 
E)  ​0.285 
A)  0.430 
B)  0.740 
C)  0.370 
D)  0.860 
E)  ​0.285

Question 6

A surface is coated with a material having index of refraction 1.69.If light in air has a wavelength of 388 nm and is normally incident on this surface,and it is found through interference effects with this light that the surface is 19 wavelengths thick,which of the following is the thickness of the surface?

Accepted Answer

A)  0.012 μm 
B)  4.4 μm 
C)  2.2 μm 
D)  1.1 μm 
E)  ​35 μm 
A)  0.012 μm 
B)  4.4 μm 
C)  2.2 μm 
D)  1.1 μm 
E)  ​35 μm

Question 7

In a Young's experiment,the paths from the slits to a point on the screen differ in length,causing destructive interference at the point.Which of the following path difference would cause this destructive interference?

Accepted Answer

A)  5λ/2 
B)  3λ/4 
C)  4λ 
D)  None of the above. 
A)  5λ/2 
B)  3λ/4 
C)  4λ 
D)  None of the above.

Question 8

Polaroid sunglasses help when skiing on snow on a sunny day by reducing the sunlight from the snow.This light from the snow has been polarized by:

Accepted Answer

A)  selective absorption. 
B)  reflection. 
C)  double refraction. 
D)  scattering. 
A)  selective absorption. 
B)  reflection. 
C)  double refraction. 
D)  scattering.

Exam 24: Wave Optics

At what angle will the sixth order maximum occur for a wavelength of 447 nm using a diffraction grating with 7,250 lines per cm?

A Young's double-slit experiment is performed in air and then the apparatus is submerged in water.What happens to the fringe separation,and what can be used to explain the change,if any?

Two flat glass plates are in contact along one end and are separated by a sheet of tissue paper at the other end.A monochromatic source of wavelength 509 nm illuminates the top plate.If 11 dark bands are counted across the top plate,what is the paper thickness? (1 nm = 10−9 m)

What is the minimum thickness of a glycerin film (n = 1.47)on which light of wavelength 688 nm shines that results in constructive interference of the reflected light? Assume the film is surrounded front and back by air.

Unpolarized light is passed through polarizer 1.The light then goes though polarizer 2 with its plane of polarization at 30.7° to that of polarizer 1.What fraction of the intensity of the original light gets though the second polarizer?

In a Young's experiment,the paths from the slits to a point on the screen differ in length,causing destructive interference at the point.Which of the following path difference would cause this destructive interference?

Polaroid sunglasses help when skiing on snow on a sunny day by reducing the sunlight from the snow.This light from the snow has been polarized by:

Introduction

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Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

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Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

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Vibrations and Waves: Part A

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Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

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Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

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Magnetism Magnets: Part A

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Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

Two flat glass plates are in contact along one end and are separated by a sheet of tissue paper at the other end.A monochromatic source of wavelength 509 nm illuminates the top plate.If 11 dark bands are counted across the top plate,what is the paper thickness? (1 nm = 10−⁹ m)