Question 1

The image of an object placed 20 cm in front of a concave mirror of focal length 10 cm will be

Accepted Answer

A)  virtual and inverted. 
B)  virtual and erect. 
C)  real and inverted. 
D)  real and erect. 
A)  virtual and inverted. 
B)  virtual and erect. 
C)  real and inverted. 
D)  real and erect. C

Question 2

A ray of light moves from air into water. Which path most accurately shows the refraction?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E C

Question 3

A ray of light in plastic reaches the edge of the plastic. The medium surrounding the plastic is air and the angle of incidence is larger than the critical angle. What will happen?

Accepted Answer

A)  The ray will refract out of the plastic, bending toward the normal line. 
B)  The ray will refract out of the plastic, bending away from the normal line. 
C)  The ray will experience total internal reflection, the angle of reflection being larger than the angle of incidence. 
D)  The ray will experience total internal reflection, the angle of reflection equaling the angle of incidence. 
E)  The ray will experience total internal reflection, the angle of reflection being smaller than the angle of incidence. 
A)  The ray will refract out of the plastic, bending toward the normal line. 
B)  The ray will refract out of the plastic, bending away from the normal line. 
C)  The ray will experience total internal reflection, the angle of reflection being larger than the angle of incidence. 
D)  The ray will experience total internal reflection, the angle of reflection equaling the angle of incidence. 
E)  The ray will experience total internal reflection, the angle of reflection being smaller than the angle of incidence. D

Question 4

Light is refracted as it crosses the interface between two different media because

Accepted Answer

A)  it changes frequency. 
B)  it loses energy. 
C)  it changes speed. 
D)  it becomes polarized. 
A)  it changes frequency. 
B)  it loses energy. 
C)  it changes speed. 
D)  it becomes polarized.

Question 5

Total internal reflection can occur when a light ray moves across a boundary between different materials in which direction?

Accepted Answer

A)  Parallel to the surface, but only if the ray is polarized 
B)  Exactly perpendicular to the surface, no matter what the indices of refraction 
C)  From the material with the faster speed of light, into the material with the slower speed of light 
D)  From a material with a slower speed of light to a material with a faster speed of light 
A)  Parallel to the surface, but only if the ray is polarized 
B)  Exactly perpendicular to the surface, no matter what the indices of refraction 
C)  From the material with the faster speed of light, into the material with the slower speed of light 
D)  From a material with a slower speed of light to a material with a faster speed of light

Question 6

Light from the sun passes through a converging lens and forms an image at

Accepted Answer

A)  infinity. 
B)  the center of the lens. 
C)  the focal point. 
D)  the center of curvature of the lens. 
A)  infinity. 
B)  the center of the lens. 
C)  the focal point. 
D)  the center of curvature of the lens.

Question 7

Fiber optics in a DVD player contain their light by employing total internal reflection. Designers surround the pure glass core with another type of glass, called cladding, that has a different index of refraction from the core.   How should you select a cladding?

Accepted Answer

A)  Cladding must have a smaller index of refraction than the core. 
B)  Cladding must have a larger index of refraction than the core. 
A)  Cladding must have a smaller index of refraction than the core. 
B)  Cladding must have a larger index of refraction than the core.

Question 8

The focal length of a glass lens depends on

Accepted Answer

A)  the curvature of the surface of the lens. 
B)  the index of refraction of the glass. 
C)  the intensity of the light passing through the lens. 
D)  both the index of refraction of the glass and the intensity of the light passing through the lens. 
E)  both the curvature of the surface of the lens and the index of refraction of the glass. 
A)  the curvature of the surface of the lens. 
B)  the index of refraction of the glass. 
C)  the intensity of the light passing through the lens. 
D)  both the index of refraction of the glass and the intensity of the light passing through the lens. 
E)  both the curvature of the surface of the lens and the index of refraction of the glass.

Question 9

A prism decomposes incident white light into its ________________ colors because of refraction.

Accepted Answer

constituent or compo

Question 10

One difference between a microscope and a telescope is that the image formed by the objective is

Accepted Answer

A)  real for the microscope but virtual for the telescope. 
B)  real for both, but the image is enlarged for the microscope and reduced for the telescope. 
C)  real for both, but the image is reduced for the microscope and enlarged for the telescope. 
D)  virtual for the microscope but real for the telescope. 
A)  real for the microscope but virtual for the telescope. 
B)  real for both, but the image is enlarged for the microscope and reduced for the telescope. 
C)  real for both, but the image is reduced for the microscope and enlarged for the telescope. 
D)  virtual for the microscope but real for the telescope.

Question 11

A converging lens

Accepted Answer

A)  always has two curved surfaces. 
B)  always has a real image. 
C)  refracts all light toward the focal point. 
D)  is thicker in the center than the edges. 
A)  always has two curved surfaces. 
B)  always has a real image. 
C)  refracts all light toward the focal point. 
D)  is thicker in the center than the edges.

Question 12

In the primary or inner rainbow, the

Accepted Answer

A)  outer edge of the bow appears red and the inner edge appears blue or violet. 
B)  outer edge of the bow appears blue or violet and the inner edge appears red. 
C)  outer edge of the bow appears yellow and the inner edge appears green. 
D)  pot of gold is always at the left end. 
A)  outer edge of the bow appears red and the inner edge appears blue or violet. 
B)  outer edge of the bow appears blue or violet and the inner edge appears red. 
C)  outer edge of the bow appears yellow and the inner edge appears green. 
D)  pot of gold is always at the left end.

Question 13

Parallel light incident on a positive lens will ___________ as it emerges.

Accepted Answer

The answer of Parallel light incident on a positive lens...

Question 14

The speed of light in a certain type of glass is 30% slower than the speed of light in air. What is the index of refraction for that type of plastic?

Accepted Answer

A)  1.33 
B)  1.43 
C)  1.5 
D)  1.67 
A)  1.33 
B)  1.43 
C)  1.5 
D)  1.67

Question 15

The image produced by a single diverging lens will ALWAYS be

Accepted Answer

A)  erect and virtual. 
B)  erect and real. 
C)  at infinity. 
D)  inverted and virtual. 
E)  inverted and real. 
A)  erect and virtual. 
B)  erect and real. 
C)  at infinity. 
D)  inverted and virtual. 
E)  inverted and real.

Question 16

A fish looks up through the smooth surface of the water at a bear directly above it. To the fish, the bear appears to be

Accepted Answer

A)  further away than it really is. 
B)  closer to the point directly above the fish than it really is. 
C)  exactly where it really is. 
D)  The bear cannot be seen by the fish, due to total internal reflection. 
A)  further away than it really is. 
B)  closer to the point directly above the fish than it really is. 
C)  exactly where it really is. 
D)  The bear cannot be seen by the fish, due to total internal reflection.

Question 17

Glasses prescribed to correct a nearsighted eye will have a _______________ (sign) focal length.

Accepted Answer

negative o

Question 18

A rainbow shows separate colors of the spectrum because, at raindrop surfaces,

Accepted Answer

A)  all colors are bent the same, hence the separation. 
B)  red light is bent more than green light. 
C)  green light is bent more than blue light. 
D)  blue light is bent more than red light. 
A)  all colors are bent the same, hence the separation. 
B)  red light is bent more than green light. 
C)  green light is bent more than blue light. 
D)  blue light is bent more than red light.

Question 19

An object is placed 10 cm in front of a concave mirror of focal length 30 cm. The image will be formed

Accepted Answer

A)  20 cm in front of the mirror. 
B)  20 cm behind the mirror. 
C)  15 cm in front of the mirror. 
D)  15 cm behind the mirror. 
E)  0.05 cm behind the mirror. 
A)  20 cm in front of the mirror. 
B)  20 cm behind the mirror. 
C)  15 cm in front of the mirror. 
D)  15 cm behind the mirror. 
E)  0.05 cm behind the mirror.

Question 20

Which of the following lenses is a diverging lens?

Accepted Answer

A)  A 
B)  B 
C)  C 
A)  A 
B)  B 
C)  C

The image of an object placed 20 cm in front of a concave mirror of focal length 10 cm will be

A ray of light moves from air into water. Which path most accurately shows the refraction? $A ray of light moves from air into water. Which path most accurately shows the refraction?$

A ray of light in plastic reaches the edge of the plastic. The medium surrounding the plastic is air and the angle of incidence is larger than the critical angle. What will happen?

Light is refracted as it crosses the interface between two different media because

Total internal reflection can occur when a light ray moves across a boundary between different materials in which direction?

Light from the sun passes through a converging lens and forms an image at

The focal length of a glass lens depends on

A prism decomposes incident white light into its ________________ colors because of refraction.

One difference between a microscope and a telescope is that the image formed by the objective is

A converging lens

In the primary or inner rainbow, the

Parallel light incident on a positive lens will ___________ as it emerges.

The speed of light in a certain type of glass is 30% slower than the speed of light in air. What is the index of refraction for that type of plastic?

The image produced by a single diverging lens will ALWAYS be

A fish looks up through the smooth surface of the water at a bear directly above it. To the fish, the bear appears to be

Glasses prescribed to correct a nearsighted eye will have a _______________ (sign) focal length.

A rainbow shows separate colors of the spectrum because, at raindrop surfaces,

An object is placed 10 cm in front of a concave mirror of focal length 30 cm. The image will be formed

Which of the following lenses is a diverging lens?

Physics, the Fundamental Science

Describing Motion

Falling Objects and Projectile Motion

Newtons Laws: Explaining Motion

Circular Motion, the Planets, and Gravity

Energy and Oscillations

Momentum and Impulse

Rotational Motion of Solid Objects

The Behavior of Fluids

Temperature and Heat

Heat Engines and the Second Law of Thermodynamics

Electrostatic Phenomena

Electric Circuits

Magnets and Electromagnetism

Making Waves

Light Waves and Color

The Structure of the Atom

The Nucleus and Nuclear Energy

Relativity

Beyond Everyday Phenomena

Filters

Exam 17: Light and Image Formation

The image of an object placed 20 cm in front of a concave mirror of focal length 10 cm will be

A ray of light moves from air into water. Which path most accurately shows the refraction?

A ray of light in plastic reaches the edge of the plastic. The medium surrounding the plastic is air and the angle of incidence is larger than the critical angle. What will happen?

Light is refracted as it crosses the interface between two different media because

Total internal reflection can occur when a light ray moves across a boundary between different materials in which direction?

Light from the sun passes through a converging lens and forms an image at

Fiber optics in a DVD player contain their light by employing total internal reflection. Designers surround the pure glass core with another type of glass, called cladding, that has a different index of refraction from the core. How should you select a cladding?

The focal length of a glass lens depends on

A prism decomposes incident white light into its ________________ colors because of refraction.

One difference between a microscope and a telescope is that the image formed by the objective is

A converging lens

In the primary or inner rainbow, the

Parallel light incident on a positive lens will ___________ as it emerges.

The speed of light in a certain type of glass is 30% slower than the speed of light in air. What is the index of refraction for that type of plastic?

The image produced by a single diverging lens will ALWAYS be

A fish looks up through the smooth surface of the water at a bear directly above it. To the fish, the bear appears to be

Glasses prescribed to correct a nearsighted eye will have a _______________ (sign) focal length.

A rainbow shows separate colors of the spectrum because, at raindrop surfaces,

An object is placed 10 cm in front of a concave mirror of focal length 30 cm. The image will be formed

Which of the following lenses is a diverging lens?

Physics, the Fundamental Science

Describing Motion

Falling Objects and Projectile Motion

Newtons Laws: Explaining Motion

Circular Motion, the Planets, and Gravity

Energy and Oscillations

Momentum and Impulse

Rotational Motion of Solid Objects

The Behavior of Fluids

Temperature and Heat

Heat Engines and the Second Law of Thermodynamics

Electrostatic Phenomena

Electric Circuits

Magnets and Electromagnetism

Making Waves

Light Waves and Color

The Structure of the Atom

The Nucleus and Nuclear Energy

Relativity

Beyond Everyday Phenomena

Filters

A ray of light moves from air into water. Which path most accurately shows the refraction? $A ray of light moves from air into water. Which path most accurately shows the refraction?$