Question 1

You see a fish in water at an apparent depth of 1.83 m.The actual depth of the fish,if the index of refraction of the water relative to air is 4/3,must be

Accepted Answer

A) 3.81 cm 
B) 61.0 cm 
C) 1.37 m 
D) 1.83 m 
E) 2.44 m 
A) 3.81 cm 
B) 61.0 cm 
C) 1.37 m 
D) 1.83 m 
E) 2.44 m

Question 2

Which of the following is not a property of all waves?

Accepted Answer

A) refraction 
B) diffraction 
C) reflection 
D) interference 
E) polarization 
A) refraction 
B) diffraction 
C) reflection 
D) interference 
E) polarization

Question 3

Use the following figure for the next problem.  
-An object leaves point A and travels to point B via path a.In region I,the speed is 100 m/s while in region II,the speed is 71 m/s.How long does it take for the object to go from A to B?

Accepted Answer

A) 80.0 ms 
B) 60.8 ms 
C) 40.6 ms 
D) 32.4 ms 
E) 26.8 ms 
A) 80.0 ms 
B) 60.8 ms 
C) 40.6 ms 
D) 32.4 ms 
E) 26.8 ms

Question 4

Ultra fast pulse lasers can emit pulses of the order 10 fs.The length of each pulse that is 10 fs long is

Accepted Answer

A) 1.0 $\mu$m 
B) 2.0 $\mu$m 
C) 3.0 $\mu$m 
D) 9.0 $\mu$m 
E) 12.0 $\mu$m 
A) 1.0 $\mu$m 
B) 2.0 $\mu$m 
C) 3.0 $\mu$m 
D) 9.0 $\mu$m 
E) 12.0 $\mu$m

Question 5

The dependence of the index of refraction on wavelength is called dispersion.A beam of light (in air)containing red and blue light is incident at an angle of 35S1U1P1$\circ$S1S1P0 on a glass plate that has an index of refraction of 1.64 for blue light and 1.61 for red light.Calculate the angle between the red and blue light inside the glass.

Accepted Answer

A) 1.3S1U1P1$\circ$S1S1P0 
B) 0.40S1U1P1$\circ$S1S1P0 
C) 0.56S1U1P1$\circ$S1S1P0 
D) 0.74S1U1P1$\circ$S1S1P0 
E) 0.13S1U1P1$\circ$S1S1P0 
A) 1.3S1U1P1$\circ$S1S1P0 
B) 0.40S1U1P1$\circ$S1S1P0 
C) 0.56S1U1P1$\circ$S1S1P0 
D) 0.74S1U1P1$\circ$S1S1P0 
E) 0.13S1U1P1$\circ$S1S1P0

Question 6

A glass block with index of refraction 1.50 is immersed in water whose index of refraction is 1.33.The critical angle at the glass-water interface is

Accepted Answer

A) 6.5º 
B) 41.9º 
C) 48.8º 
D) 56.3º 
E) 62.5º 
A) 6.5º 
B) 41.9º 
C) 48.8º 
D) 56.3º 
E) 62.5º

Question 7

An "X" is marked on the bottom of a glass container.A microscope is adjusted so that it is focused on the "X." A liquid is now poured into the glass to a depth of 6.00 cm.If the microscope has to be backed up by a distance of 1.50 cm to refocus on the "X," then calculate the refractive index of the liquid.

Accepted Answer

A) 1.25 
B) 4.00 
C) 1.33 
D) 0.75 
E) 3.00 
A) 1.25 
B) 4.00 
C) 1.33 
D) 0.75 
E) 3.00

Question 8

The optical phenomenon that is usually cited as demonstrating the transverse wave nature of light is

Accepted Answer

A) dispersion 
B) interference 
C) reflection 
D) polarization 
E) refraction 
A) dispersion 
B) interference 
C) reflection 
D) polarization 
E) refraction

Question 9

Four perfectly polarizing plates are stacked so that the axis of each plate is turned 30º clockwise with respect to that of the plate above it.The percentage of the incident unpolarized light that is transmitted by the stack is approximately

Accepted Answer

A) zero 
B) 0.78% 
C) 6.3% 
D) 21% 
E) 27% 
A) zero 
B) 0.78% 
C) 6.3% 
D) 21% 
E) 27%

Question 10

The fact that light can be polarized shows that it must be

Accepted Answer

A) a wave motion. 
B) a transverse wave. 
C) a longitudinal wave. 
D) transmitted by waves of very short length. 
E) monochromatic. 
A) a wave motion. 
B) a transverse wave. 
C) a longitudinal wave. 
D) transmitted by waves of very short length. 
E) monochromatic.

Question 11

A column of liquid is 10 cm high.Viewed from above the liquid has an apparent depth of 6.77 cm.If the refractive index of the liquid is 1.33 at the top and increases uniformly to the bottom,then what is the refractive index at the bottom of the liquid?

Accepted Answer

A) 1.96 
B) 2.95 
C) 1.48 
D) 1.62 
E) None of these is correct. 
A) 1.96 
B) 2.95 
C) 1.48 
D) 1.62 
E) None of these is correct.

Question 12

Two ideal polarizing sheets with their planes of polarization parallel to each other pass light of intensity I.If the planes are rotated in such a way that their planes of polarization make an angle of 40.0º,the intensity is approximately

Accepted Answer

A) 0.293I 
B) 0.383I 
C) 0.502I 
D) 0.585I 
E) 0.770I 
A) 0.293I 
B) 0.383I 
C) 0.502I 
D) 0.585I 
E) 0.770I

Question 13

Sound waves differ from light waves in many respects.One important difference is that sound waves cannot

Accepted Answer

A) be refracted. 
B) be reflected. 
C) show interference. 
D) show diffraction. 
E) be polarized. 
A) be refracted. 
B) be reflected. 
C) show interference. 
D) show diffraction. 
E) be polarized.

Question 14

Plane-polarized light cannot be produced by

Accepted Answer

A) dispersion 
B) dichroism 
C) reflection 
D) scattering 
E) refraction 
A) dispersion 
B) dichroism 
C) reflection 
D) scattering 
E) refraction

Question 15

The index of refraction of water is 1.33.The angle of incidence for maximum polarization by reflection is approximately

Accepted Answer

A) 57º 
B) 53º 
C) 45º 
D) 37º 
E) 33º 
A) 57º 
B) 53º 
C) 45º 
D) 37º 
E) 33º

Question 16

The index of refraction of a sample of glass cannot be determined by measuring the

Accepted Answer

A) Brewster's angle. 
B) critical angle. 
C) angle of minimum deviation. 
D) ratio of true to apparent depth. 
E) angle of dispersion between red and violet light. 
A) Brewster's angle. 
B) critical angle. 
C) angle of minimum deviation. 
D) ratio of true to apparent depth. 
E) angle of dispersion between red and violet light.

Question 17

The photon energy for light of wavelength 500 nm is approximately

Accepted Answer

A) 1.77 eV 
B) 3.10 eV 
C) 6.20 eV 
D) 2.48 eV 
E) 5.46 eV 
A) 1.77 eV 
B) 3.10 eV 
C) 6.20 eV 
D) 2.48 eV 
E) 5.46 eV

Question 18

"To find the value of the resultant displacement for overlapping waves at any point at a particular instant,it is only necessary to add the values of the displacements for the individual waves." This is a statement of

Accepted Answer

A) Huygens' principle. 
B) the principle of superposition. 
C) Bernoulli's principle. 
D) the principle of dispersion. 
E) Newton's theory of light. 
A) Huygens' principle. 
B) the principle of superposition. 
C) Bernoulli's principle. 
D) the principle of dispersion. 
E) Newton's theory of light.

Question 19

A 60S1U1P1$\circ$S1S1P0 prism has a refractive index of 1.52.Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

Accepted Answer

A) 41.1S1U1P1$\circ$S1S1P0 
B) 18.9S1U1P1$\circ$S1S1P0 
C) 29.4S1U1P1$\circ$S1S1P0 
D) 30.6S1U1P1$\circ$S1S1P0 
E) 60.6S1U1P1$\circ$S1S1P0 
A) 41.1S1U1P1$\circ$S1S1P0 
B) 18.9S1U1P1$\circ$S1S1P0 
C) 29.4S1U1P1$\circ$S1S1P0 
D) 30.6S1U1P1$\circ$S1S1P0 
E) 60.6S1U1P1$\circ$S1S1P0

Question 20

Huygens' theory for the construction of wavefronts states that

Accepted Answer

A) the angle of incidence is always less than the angle of refraction. 
B) the time required for light to travel from one point to another is either a maximum or minimum. 
C) only parallel light produces interference and diffraction. 
D) each point on a wavefront is itself the source of a secondary spherical wave. 
E) all wavefronts are spherical. 
A) the angle of incidence is always less than the angle of refraction. 
B) the time required for light to travel from one point to another is either a maximum or minimum. 
C) only parallel light produces interference and diffraction. 
D) each point on a wavefront is itself the source of a secondary spherical wave. 
E) all wavefronts are spherical.

Exam 31: Properties of Light

You see a fish in water at an apparent depth of 1.83 m.The actual depth of the fish,if the index of refraction of the water relative to air is 4/3,must be

Which of the following is not a property of all waves?

Use the following figure for the next problem. -An object leaves point A and travels to point B via path a.In region I,the speed is 100 m/s while in region II,the speed is 71 m/s.How long does it take for the object to go from A to B?

Ultra fast pulse lasers can emit pulses of the order 10 fs.The length of each pulse that is 10 fs long is

A glass block with index of refraction 1.50 is immersed in water whose index of refraction is 1.33.The critical angle at the glass-water interface is

The optical phenomenon that is usually cited as demonstrating the transverse wave nature of light is

Four perfectly polarizing plates are stacked so that the axis of each plate is turned 30º clockwise with respect to that of the plate above it.The percentage of the incident unpolarized light that is transmitted by the stack is approximately

The fact that light can be polarized shows that it must be

A column of liquid is 10 cm high.Viewed from above the liquid has an apparent depth of 6.77 cm.If the refractive index of the liquid is 1.33 at the top and increases uniformly to the bottom,then what is the refractive index at the bottom of the liquid?

Two ideal polarizing sheets with their planes of polarization parallel to each other pass light of intensity I.If the planes are rotated in such a way that their planes of polarization make an angle of 40.0º,the intensity is approximately

Sound waves differ from light waves in many respects.One important difference is that sound waves cannot

Plane-polarized light cannot be produced by

The index of refraction of water is 1.33.The angle of incidence for maximum polarization by reflection is approximately

The index of refraction of a sample of glass cannot be determined by measuring the

The photon energy for light of wavelength 500 nm is approximately

"To find the value of the resultant displacement for overlapping waves at any point at a particular instant,it is only necessary to add the values of the displacements for the individual waves." This is a statement of

A 60 ∘\circ∘ prism has a refractive index of 1.52.Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.

Huygens' theory for the construction of wavefronts states that

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A 60^$\circ$ prism has a refractive index of 1.52.Calculate the angle of incidence for the initial light ray that is then refracted inside the prism and just undergoes total internal reflection at the opposite face of the prism.