Question 1

Light is incident at the Brewster angle on a plastic plate in air.The angle of refraction is 35.0°.
-Determine the Brewster angle.

Accepted Answer

A) 35.0° 
B) 55.0° 
C) 46.5° 
D) 43.5° 
E) 82.3° 
A) 35.0° 
B) 55.0° 
C) 46.5° 
D) 43.5° 
E) 82.3°

Question 2

A grizzly bear is sitting on a rock in the middle of a calm river when she observes a fish directly below.If the apparent depth of the fish is 0.40 m,what is the actual depth at which the fish is swimming? The index of refraction of water is 1.33.

Accepted Answer

A) 0.80 m 
B) 0.71 m 
C) 0.62 m 
D) 0.53 m 
E) 0.45 m 
A) 0.80 m 
B) 0.71 m 
C) 0.62 m 
D) 0.53 m 
E) 0.45 m

Question 3

What is the Brewster angle when light is reflected from a plastic plate (n = 1.575)submerged in ethyl alcohol (n = 1.362)?

Accepted Answer

A) 68.3° 
B) 40.8° 
C) 59.8° 
D) 30.1° 
E) 49.1° 
A) 68.3° 
B) 40.8° 
C) 59.8° 
D) 30.1° 
E) 49.1°

Question 4

What is the frequency of light that has a wavelength in water of 788 nm if the refractive index for this light is 1.33?

Accepted Answer

A) 3.76 × 10¹⁴ Hz 
B) 5.00 × 10¹⁴ Hz 
C) 6.65 × 10¹⁴ Hz 
D) 2.86 × 10¹⁴ Hz 
E) 9.52 × 10¹⁴ Hz 
A) 3.76 × 10¹⁴ Hz 
B) 5.00 × 10¹⁴ Hz 
C) 6.65 × 10¹⁴ Hz 
D) 2.86 × 10¹⁴ Hz 
E) 9.52 × 10¹⁴ Hz

Question 5

A light ray is traveling in a diamond (n = 2.419).If the ray approaches the diamond-air interface,what is the minimum angle of incidence that will result in all of the light reflected back into the diamond? The index of refraction for air is 1.000.

Accepted Answer

A) 24.42° 
B) 32.46° 
C) 54.25° 
D) 65.58° 
E) 77.54° 
A) 24.42° 
B) 32.46° 
C) 54.25° 
D) 65.58° 
E) 77.54°

Question 6

When an object is placed 15 cm from a lens,a virtual image is formed.Which one of the following conclusions is incorrect?

Accepted Answer

A) The lens may be a convex or concave. 
B) If the image is upright the lens must be a diverging lens. 
C) If the image is reduced,the lens must be a diverging lens. 
D) If the lens is a diverging lens,the image distance must be less than 15 cm. 
E) If the lens is a converging lens,the focal length must be greater than 15 cm. 
A) The lens may be a convex or concave. 
B) If the image is upright the lens must be a diverging lens. 
C) If the image is reduced,the lens must be a diverging lens. 
D) If the lens is a diverging lens,the image distance must be less than 15 cm. 
E) If the lens is a converging lens,the focal length must be greater than 15 cm.

Question 7

A 1.5-cm object is placed 0.50 m to the left of a diverging lens with a focal length of 0.20 m.A converging lens with a focal length of 0.17 m is located 0.08 m to the right of the diverging lens.
-What is the location of the final image with respect to the object?

Accepted Answer

A) The final image is located 0.14 m to the left of the object. 
B) The final image is located 0.32 m to the right of the object. 
C) The final image is located 0.40 m to the right of the object. 
D) The final image is located 0.83 m to the right of the object. 
E) The final image is located 1.3 m to the right of the object. 
A) The final image is located 0.14 m to the left of the object. 
B) The final image is located 0.32 m to the right of the object. 
C) The final image is located 0.40 m to the right of the object. 
D) The final image is located 0.83 m to the right of the object. 
E) The final image is located 1.3 m to the right of the object.

Question 8

The speed of light in material A is 1.4 times as large as it is in material B.What is the ratio of the refractive indices,nA/nB,of these materials?

Accepted Answer

A) 1.4 
B) 1.2 
C) 1.0 
D) 0.80 
E) 0.71 
A) 1.4 
B) 1.2 
C) 1.0 
D) 0.80 
E) 0.71

Question 9

The right lens of Josh's contact lenses is a converging lens of +2.50 diopters.He can read a book held as close as 25 cm from his eyes.Complete the following statement: Without his lenses,Josh's right eye has

Accepted Answer

A) a far point of 15.4 cm. 
B) a far point of 40.0 cm. 
C) a far point of 66.7 cm. 
D) a near point of 15.4 cm. 
E) a near point of 66.7 cm. 
A) a far point of 15.4 cm. 
B) a far point of 40.0 cm. 
C) a far point of 66.7 cm. 
D) a near point of 15.4 cm. 
E) a near point of 66.7 cm.

Question 10

A ray of light passes from air into a block of glass with a refractive index of 1.59 as shown in the figure. Note: The drawing is not to scale.
  What is the value of the distance D?

Accepted Answer

A) 1.42 cm 
B) 1.66 cm 
C) 1.93 cm 
D) 2.19 cm 
E) 2.38 cm 
A) 1.42 cm 
B) 1.66 cm 
C) 1.93 cm 
D) 2.19 cm 
E) 2.38 cm

Question 11

A beam of light that consists of a mixture of red,green and violet light strikes a prism (surrounded by air)as shown.Indices of refraction for this prism for the various colors are indicated in the table.An observer is located to the right of the prism as shown.
    
-Which physical phenomenon is illustrated by the fact that the emerging rays are spread into the component colors of the beam?

Accepted Answer

A) Doppler effect 
B) dispersion 
C) diffraction 
D) total internal reflection 
E) interference 
A) Doppler effect 
B) dispersion 
C) diffraction 
D) total internal reflection 
E) interference

Question 12

A child sitting at the edge of a swimming pool sees a coin resting on the bottom of the pool.The coin appears to be 0.75 m directly below the water's surface.How deep is the pool at the location of the coin? The index of refraction of water is 1.33.

Accepted Answer

A) 0.75 m 
B) 0.86 m 
C) 1.0 m 
D) 1.2 m 
E) 1.6 m 
A) 0.75 m 
B) 0.86 m 
C) 1.0 m 
D) 1.2 m 
E) 1.6 m

Question 13

Light propagates from soda lime glass (n = 1.518)into Pyrex glass (n = 1.473).Determine the critical angle for this situation.

Accepted Answer

A) 13.99° 
B) 45.86° 
C) 52.48° 
D) 65.22° 
E) 76.01° 
A) 13.99° 
B) 45.86° 
C) 52.48° 
D) 65.22° 
E) 76.01°

Question 14

The figure shows a ray of light that originates in an aquarium.It travels through water,is incident on the glass side,and emerges into the air.Ignore any partial reflections.Note: The figure is not drawn to scale.
  
-Which entry in the table below gives the correct values for the angles shown in the figure?

Accepted Answer

The answer of The figure shows a ray of light...

Question 15

A ray of light originates in medium A and is incident upon medium B.For which one of the following pairs of indices of refraction for A and B is total internal reflection not possible?

Accepted Answer

The answer of A ray of light originates in medium...

Question 16

A stamp collector used a magnifying glass with a focal length of 24.0 cm to observe his favorite stamp .The image of the stamp was located at his near point distance of 30.0 cm.What was the approximate angular magnification of the magnifying glass when the collector observed his stamp?

Accepted Answer

A) 1.00 
B) 1.25 
C) 1.75 
D) 2.00 
E) 2.25 
A) 1.00 
B) 1.25 
C) 1.75 
D) 2.00 
E) 2.25

Question 17

In a scene from a movie,a nearsighted character removes his eyeglasses and uses them to focus the nearly parallel rays of the sun to start a fire.What is physically wrong with this scene?

Accepted Answer

A) The eyeglasses have diverging lenses and cannot be used to focus parallel rays. 
B) The eyeglasses have converging lenses and cannot be used to focus parallel rays. 
C) Sunlight cannot be used to start a fire. 
D) A fire can only be started if the image is virtual. 
E) Parallel rays cannot be focused. 
A) The eyeglasses have diverging lenses and cannot be used to focus parallel rays. 
B) The eyeglasses have converging lenses and cannot be used to focus parallel rays. 
C) Sunlight cannot be used to start a fire. 
D) A fire can only be started if the image is virtual. 
E) Parallel rays cannot be focused.

Question 18

A ray of blue light travels through air and is refracted as it enters a glass prism shown in the figure.An unknown liquid is in contact with the right side of the prism.The light then follows the path shown.Which one of the following statements concerning this situation is true?

Accepted Answer

A) The frequency of the light changes inside the prism. 
B) The index of refraction of the glass is smaller than that of air. 
C) The index of refraction of the unknown liquid is the same as that of the glass. 
D) The speed of light is larger in the liquid than in the glass. 
E) The refractive index of the liquid is the same as that of air. 
A) The frequency of the light changes inside the prism. 
B) The index of refraction of the glass is smaller than that of air. 
C) The index of refraction of the unknown liquid is the same as that of the glass. 
D) The speed of light is larger in the liquid than in the glass. 
E) The refractive index of the liquid is the same as that of air.

Question 19

The figure is a scaled diagram of an object and a converging lens surrounded by air.Only one focal point,F,of the lens is shown.
  
-Which pair of terms most accurately describes the image?

Accepted Answer

A) real,upright 
B) real,inverted 
C) virtual,upright 
D) virtual,inverted 
E) virtual,reduced 
A) real,upright 
B) real,inverted 
C) virtual,upright 
D) virtual,inverted 
E) virtual,reduced

Question 20

The figure shows the path of a portion of a ray of light as it passes through three different materials. Note: The figure is drawn to scale.
  What can be concluded concerning the refractive indices of these three materials?

Accepted Answer

A) n₁ n₂ > n₃ C) n₃ < n₁ < n₂ D) n₂ < n₁ < n₃ E) n₁ < n₃ < n₂ A) n₁ n₂ > n₃ C) n₃ < n₁ < n₂ D) n₂ < n₁ < n₃ E) n₁ < n₃ < n₂

Light is incident at the Brewster angle on a plastic plate in air.The angle of refraction is 35.0°. -Determine the Brewster angle.

A grizzly bear is sitting on a rock in the middle of a calm river when she observes a fish directly below.If the apparent depth of the fish is 0.40 m,what is the actual depth at which the fish is swimming? The index of refraction of water is 1.33.

What is the Brewster angle when light is reflected from a plastic plate (n = 1.575)submerged in ethyl alcohol (n = 1.362)?

What is the frequency of light that has a wavelength in water of 788 nm if the refractive index for this light is 1.33?

A light ray is traveling in a diamond (n = 2.419).If the ray approaches the diamond-air interface,what is the minimum angle of incidence that will result in all of the light reflected back into the diamond? The index of refraction for air is 1.000.

When an object is placed 15 cm from a lens,a virtual image is formed.Which one of the following conclusions is incorrect?

A 1.5-cm object is placed 0.50 m to the left of a diverging lens with a focal length of 0.20 m.A converging lens with a focal length of 0.17 m is located 0.08 m to the right of the diverging lens. -What is the location of the final image with respect to the object?

The speed of light in material A is 1.4 times as large as it is in material B.What is the ratio of the refractive indices,nA/nB,of these materials?

The right lens of Josh's contact lenses is a converging lens of +2.50 diopters.He can read a book held as close as 25 cm from his eyes.Complete the following statement: Without his lenses,Josh's right eye has

A child sitting at the edge of a swimming pool sees a coin resting on the bottom of the pool.The coin appears to be 0.75 m directly below the water's surface.How deep is the pool at the location of the coin? The index of refraction of water is 1.33.

Light propagates from soda lime glass (n = 1.518)into Pyrex glass (n = 1.473).Determine the critical angle for this situation.

A stamp collector used a magnifying glass with a focal length of 24.0 cm to observe his favorite stamp .The image of the stamp was located at his near point distance of 30.0 cm.What was the approximate angular magnification of the magnifying glass when the collector observed his stamp?

In a scene from a movie,a nearsighted character removes his eyeglasses and uses them to focus the nearly parallel rays of the sun to start a fire.What is physically wrong with this scene?

The figure is a scaled diagram of an object and a converging lens surrounded by air.Only one focal point,F,of the lens is shown. -Which pair of terms most accurately describes the image?

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electric Circuits

Electromagnetic Induction

The Refl Ection of Light: Mirrors

Particles and Waves

Filters

Exam 26: The Refraction of Light: Lenses and Optical Instruments

Light is incident at the Brewster angle on a plastic plate in air.The angle of refraction is 35.0°. -Determine the Brewster angle.

A grizzly bear is sitting on a rock in the middle of a calm river when she observes a fish directly below.If the apparent depth of the fish is 0.40 m,what is the actual depth at which the fish is swimming? The index of refraction of water is 1.33.

What is the Brewster angle when light is reflected from a plastic plate (n = 1.575)submerged in ethyl alcohol (n = 1.362)?

What is the frequency of light that has a wavelength in water of 788 nm if the refractive index for this light is 1.33?

A light ray is traveling in a diamond (n = 2.419).If the ray approaches the diamond-air interface,what is the minimum angle of incidence that will result in all of the light reflected back into the diamond? The index of refraction for air is 1.000.

When an object is placed 15 cm from a lens,a virtual image is formed.Which one of the following conclusions is incorrect?

A 1.5-cm object is placed 0.50 m to the left of a diverging lens with a focal length of 0.20 m.A converging lens with a focal length of 0.17 m is located 0.08 m to the right of the diverging lens. -What is the location of the final image with respect to the object?

The speed of light in material A is 1.4 times as large as it is in material B.What is the ratio of the refractive indices,nA/nB,of these materials?

The right lens of Josh's contact lenses is a converging lens of +2.50 diopters.He can read a book held as close as 25 cm from his eyes.Complete the following statement: Without his lenses,Josh's right eye has

A ray of light passes from air into a block of glass with a refractive index of 1.59 as shown in the figure. Note: The drawing is not to scale. What is the value of the distance D?

A child sitting at the edge of a swimming pool sees a coin resting on the bottom of the pool.The coin appears to be 0.75 m directly below the water's surface.How deep is the pool at the location of the coin? The index of refraction of water is 1.33.

Light propagates from soda lime glass (n = 1.518)into Pyrex glass (n = 1.473).Determine the critical angle for this situation.

A ray of light originates in medium A and is incident upon medium B.For which one of the following pairs of indices of refraction for A and B is total internal reflection not possible?

A stamp collector used a magnifying glass with a focal length of 24.0 cm to observe his favorite stamp .The image of the stamp was located at his near point distance of 30.0 cm.What was the approximate angular magnification of the magnifying glass when the collector observed his stamp?

In a scene from a movie,a nearsighted character removes his eyeglasses and uses them to focus the nearly parallel rays of the sun to start a fire.What is physically wrong with this scene?

A ray of blue light travels through air and is refracted as it enters a glass prism shown in the figure.An unknown liquid is in contact with the right side of the prism.The light then follows the path shown.Which one of the following statements concerning this situation is true?

The figure is a scaled diagram of an object and a converging lens surrounded by air.Only one focal point,F,of the lens is shown. -Which pair of terms most accurately describes the image?

The figure shows the path of a portion of a ray of light as it passes through three different materials. Note: The figure is drawn to scale. What can be concluded concerning the refractive indices of these three materials?

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electric Circuits

Electromagnetic Induction

The Refl Ection of Light: Mirrors

Particles and Waves

Filters