Question 1

When an object is closer to a concave mirror than the mirror's focal point,the

Accepted Answer

A) magnification is less than one. 
B) image distance is greater than the object distance. 
C) magnification is equal to one. 
D) image distance is negative. 
E) image is inverted. 
A) magnification is less than one. 
B) image distance is greater than the object distance. 
C) magnification is equal to one. 
D) image distance is negative. 
E) image is inverted.

Question 2

The objective of a certain lens system is a double-convex lens of 10.2 cm focal length; the eyepiece is a lens of 15.2 cm focal length and is placed 25.4 cm behind the objective.When an object is 30.5 cm in front of the objective,how far is the image from the eyepiece?

Accepted Answer

A) 44.2 cm 
B) 30.5 cm 
C) 5.08 cm 
D) 22.1 cm 
E) 61.0 cm 
A) 44.2 cm 
B) 30.5 cm 
C) 5.08 cm 
D) 22.1 cm 
E) 61.0 cm

Question 3

A double-convex lens is made of glass of refractive index 1.50.The radii of curvature of the surfaces are 10 cm and 20 cm.The focal length of this lens is

Accepted Answer

A) 4.45 cm 
B) 13.3 cm 
C) -13.3 cm 
D) 40 cm 
E) -40 cm 
A) 4.45 cm 
B) 13.3 cm 
C) -13.3 cm 
D) 40 cm 
E) -40 cm

Question 4

An object is located 3 cm in front of a converging lens of focal length 2 cm.A diverging lens of -6 cm focal length is placed 3 cm on the other side of the converging lens.What is the final image distance with respect to the diverging lens?

Accepted Answer

A) $\infty$ 
B) 2 cm 
C) -2 cm 
D) 6 cm 
E) -6 cm 
A) $\infty$ 
B) 2 cm 
C) -2 cm 
D) 6 cm 
E) -6 cm

Question 5

A typical farsighted person requires

Accepted Answer

A) glasses with converging lenses to drive. 
B) glasses with diverging lenses to drive. 
C) glasses with converging lenses to read. 
D) glasses with diverging lenses to read. 
E) no glasses to read. 
A) glasses with converging lenses to drive. 
B) glasses with diverging lenses to drive. 
C) glasses with converging lenses to read. 
D) glasses with diverging lenses to read. 
E) no glasses to read.

Question 6

An object 2 cm high is placed 20 cm from a thin convex lens that has a focal length of 10 cm.Which of the following statements describes the image formed?

Accepted Answer

A) It is 2 cm high. 
B) It is 20 cm from the lens. 
C) It is inverted. 
D) It is real. 
E) All of these are correct. 
A) It is 2 cm high. 
B) It is 20 cm from the lens. 
C) It is inverted. 
D) It is real. 
E) All of these are correct.

Question 7

How far must a man's face be located in front of a concave spherical shaving mirror of radius 120 cm for him to see an erect image of his face four times its real size?

Accepted Answer

A) -75 cm 
B) 45 cm 
C) 75 cm 
D) 90 cm 
E) 150 cm 
A) -75 cm 
B) 45 cm 
C) 75 cm 
D) 90 cm 
E) 150 cm

Question 8

An object 0.50 cm high is 5.0 cm from a concave spherical mirror of focal length 20 cm.How high is the image and is it erect or inverted?

Accepted Answer

A) 0.40 cm,inverted 
B) 0.67 cm,erect 
C) 0.50 cm,inverted 
D) 0.67 cm,inverted 
E) 0.40 cm,erect 
A) 0.40 cm,inverted 
B) 0.67 cm,erect 
C) 0.50 cm,inverted 
D) 0.67 cm,inverted 
E) 0.40 cm,erect

Question 9

You have two lenses for making a compound microscope: fo = 0.800 cm and fe = 1.20 cm.How far apart should you set the the lenses to get a magnification of -300? (Assume the normal near point of 25.0 cm.)

Accepted Answer

A) 11.5 cm 
B) 12.7 cm 
C) 13.5 cm 
D) 13.9 cm 
E) 15.0 cm 
A) 11.5 cm 
B) 12.7 cm 
C) 13.5 cm 
D) 13.9 cm 
E) 15.0 cm

Question 10

When you look at the image reflected from two plane mirrors placed at 90S1U1P1$\circ$S1S1P0,the image

Accepted Answer

A) is real. 
B) is inverted. 
C) does not change handiness. 
D) is compressed in the vertical direction. 
E) None of the above statements is true. 
A) is real. 
B) is inverted. 
C) does not change handiness. 
D) is compressed in the vertical direction. 
E) None of the above statements is true.

Question 11

A thin converging lens made of Crown glass (n = 1.517)is flat on one side and has a radius of curvature of 50 cm on the other side.An object is placed 45.0 cm to the left of this lens.Where is the image?

Accepted Answer

A) 120 cm to the right of the lens 
B) 31 cm to the left of the lens 
C) 31 cm to the right of the lens 
D) 84 cm to the right of the lens 
E) 84 cm to the left of the lens 
A) 120 cm to the right of the lens 
B) 31 cm to the left of the lens 
C) 31 cm to the right of the lens 
D) 84 cm to the right of the lens 
E) 84 cm to the left of the lens

Question 12

The clear water of a lake is 1.5 m deep at the end of a dock.You look directly down from the end of the dock and see a rock on the bottom of the lake.How far below the surface does the rock appear to be? (For water,n = 1.33.)

Accepted Answer

A) 2.0 m 
B) 1.5 m 
C) 1.1 m 
D) 0.75 m 
E) 1.8 m 
A) 2.0 m 
B) 1.5 m 
C) 1.1 m 
D) 0.75 m 
E) 1.8 m

Question 13

The lens system used in a Galilean telescope or opera glasses consists of a positive lens and a negative lens on the same axis.In the following ray diagrams the focal points of the positive lens are marked F and F' and those of the negative lens are marked f and f'.The points F and f' coincide.A ray of light comes from a distant object,traverses the system,and enters an eye on the right side of the diagram.Which of the ray diagrams is correct?

Accepted Answer

A)    
B)   
C)    
D)    
E)  None of these is correct 
A)    
B)   
C)    
D)    
E)  None of these is correct

Question 14

When you stand in water up to your knees,your feet appear

Accepted Answer

A) closer than usual. 
B) farther away than usual. 
C) at the same location as usual. 
D) To answer this you must know your height and the depth of the water. 
E) To answer this you must know the index of refraction of water. 
A) closer than usual. 
B) farther away than usual. 
C) at the same location as usual. 
D) To answer this you must know your height and the depth of the water. 
E) To answer this you must know the index of refraction of water.

Question 15

Your microscope has an objective lens of focal length 1.20 cm and an eyepiece of focal length 2.40 cm separated by 16.0 cm.What is the magnifying power if your near point is 25.0 cm?

Accepted Answer

A) 150 
B) -150 
C) 136 
D) -75 
E) -108 
A) 150 
B) -150 
C) 136 
D) -75 
E) -108

Question 16

A lens forms an erect image of a real object.The image is twice the size of the object and appears to be 40 cm from the lens.Determine the power of the lens in diopters (D).

Accepted Answer

A) There is not sufficient information. 
B) -2.5 D 
C) +2.5 D 
D) +7.5 D 
E) None of these is correct. 
A) There is not sufficient information. 
B) -2.5 D 
C) +2.5 D 
D) +7.5 D 
E) None of these is correct.

Question 17

A lens of focal length -45 cm is used to correct the vision of a nearsighted person.Where is this person's far point?

Accepted Answer

A) 90 cm 
B) 45 cm 
C) 25 cm 
D) 70 cm 
E) 20 cm 
A) 90 cm 
B) 45 cm 
C) 25 cm 
D) 70 cm 
E) 20 cm

Question 18

The resolving power of a telescope is a measure of the ability of the instrument to

Accepted Answer

A) form a plane image of a plane object. 
B) produce a large image. 
C) eliminate aberrations. 
D) produce a bright image. 
E) form distinctly separate images of points close together on the object. 
A) form a plane image of a plane object. 
B) produce a large image. 
C) eliminate aberrations. 
D) produce a bright image. 
E) form distinctly separate images of points close together on the object.

Question 19

The 200-in reflecting telescope at Mt.Palomar has an objective mirror with a focal length of 16.8 m.If you use an eyepiece with a focal length of 2.00 cm,what is the overall magnification of this telescope?

Accepted Answer

A) -250 
B) -130 
C) -840 
D) -38 
E) -300 
A) -250 
B) -130 
C) -840 
D) -38 
E) -300

Question 20

Your nearsighted coach cannot focus clearly on objects more distant than 50 cm from his eye.What power lenses are required for him to follow the flight of a batted ball?

Accepted Answer

A) 50 
B) -2.0 
C) 0.67 
D) -0.67 
E) 2.0 
A) 50 
B) -2.0 
C) 0.67 
D) -0.67 
E) 2.0

Exam 32: Optical Images

When an object is closer to a concave mirror than the mirror's focal point,the

The objective of a certain lens system is a double-convex lens of 10.2 cm focal length; the eyepiece is a lens of 15.2 cm focal length and is placed 25.4 cm behind the objective.When an object is 30.5 cm in front of the objective,how far is the image from the eyepiece?

A double-convex lens is made of glass of refractive index 1.50.The radii of curvature of the surfaces are 10 cm and 20 cm.The focal length of this lens is

An object is located 3 cm in front of a converging lens of focal length 2 cm.A diverging lens of -6 cm focal length is placed 3 cm on the other side of the converging lens.What is the final image distance with respect to the diverging lens?

A typical farsighted person requires

An object 2 cm high is placed 20 cm from a thin convex lens that has a focal length of 10 cm.Which of the following statements describes the image formed?

How far must a man's face be located in front of a concave spherical shaving mirror of radius 120 cm for him to see an erect image of his face four times its real size?

An object 0.50 cm high is 5.0 cm from a concave spherical mirror of focal length 20 cm.How high is the image and is it erect or inverted?

You have two lenses for making a compound microscope: fo = 0.800 cm and fe = 1.20 cm.How far apart should you set the the lenses to get a magnification of -300? (Assume the normal near point of 25.0 cm.)

When you look at the image reflected from two plane mirrors placed at 90 ∘\circ∘ ,the image

A thin converging lens made of Crown glass (n = 1.517)is flat on one side and has a radius of curvature of 50 cm on the other side.An object is placed 45.0 cm to the left of this lens.Where is the image?

The clear water of a lake is 1.5 m deep at the end of a dock.You look directly down from the end of the dock and see a rock on the bottom of the lake.How far below the surface does the rock appear to be? (For water,n = 1.33.)

When you stand in water up to your knees,your feet appear

Your microscope has an objective lens of focal length 1.20 cm and an eyepiece of focal length 2.40 cm separated by 16.0 cm.What is the magnifying power if your near point is 25.0 cm?

A lens forms an erect image of a real object.The image is twice the size of the object and appears to be 40 cm from the lens.Determine the power of the lens in diopters (D).

A lens of focal length -45 cm is used to correct the vision of a nearsighted person.Where is this person's far point?

The resolving power of a telescope is a measure of the ability of the instrument to

The 200-in reflecting telescope at Mt.Palomar has an objective mirror with a focal length of 16.8 m.If you use an eyepiece with a focal length of 2.00 cm,what is the overall magnification of this telescope?

Your nearsighted coach cannot focus clearly on objects more distant than 50 cm from his eye.What power lenses are required for him to follow the flight of a batted ball?

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

The Electric Field I: Discrete Charge Distributions

The Electric Field Ii: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

You have two lenses for making a compound microscope: f_o = 0.800 cm and f_e = 1.20 cm.How far apart should you set the the lenses to get a magnification of -300? (Assume the normal near point of 25.0 cm.)

When you look at the image reflected from two plane mirrors placed at 90^$\circ$,the image