AP Physics Take-Home Quiz Due Monday, January 9Thname

AP Physics Take-Home Quiz – due Monday, January 9thName:

Geometric Optics – Mirrors and Lenses

1)An object is placed in front of a converging thin lens at a distance from the center of the lens equal to half the focal length. Compared to the object, the image is

(A) upright and larger

(B) upright and smaller

(C) inverted and larger

(D) inverted and smaller

(E) inverted and the same size

2)Which of the following is not a ray that could be drawn reflecting off of a concave mirror?

(A)an incident ray through the mirror’s center of curvature, reflecting back through the center of curvature

(B)an incident ray through the focal point, reflecting parallel to the principal axis

(C)an incident ray parallel to the principal axis, reflecting through the focal point

(D)an incident ray to the intersection of the principal axis with the mirror, reflecting at an equal angle

(E)an incident ray through the center of curvature, reflecting through the focal point

3)An illuminated object is placed 0.30 meter from a concave lens whose focal length is -0.15 m. The image is

(A) inverted, real, and 0.30 meters from the lens on the opposite side from the object

(B) upright, virtual, and 0.30 meters from the lens on the opposite side, from the object

(C) upright, real, and 0.10 meters from the lens on the same side as the object

(D) upright, virtual, and 0.10 meters from the lens on the same side as the object

(E) inverted, real, and 0.10 meters from the lens on the same side as the object

4)An object is placed as shown in the figure above. The center of curvature C and the focal point F of the reflecting surface are marked. As compared with the object, the image formed by the reflecting surface is

(A) erect and larger

(B) erect and the same size

(C) erect and smaller

(D) inverted and larger

(E) inverted and smaller

I. Concave mirror

II. Convex mirror

III. Concave lens

IV. Convex lens

5)Which of the optical instruments listed above can produce a virtual image of an object that is smaller than the object itself?

(A) I only (B) II only (C) III only

(D) II and III only (E) I and IV only

6)When one uses a magnifying glass to read fine print, one uses a

(A) converging lens to produce a virtual image of the print

(B) converging lens to produce a real image of the print

(C) mirror to produce a virtual image of the print

(D) diverging lens to produce a real image of the print

(E) diverging lens to produce a virtual image of the print

7)The image of the arrow is larger than the arrow itself in which of the following cases?

(A) I only

(B) II only

(C) I and III only

(D) II and III only

(E) I, II, and III

8)An object is placed at a distance of 1.5 from a converging lens of focal length , as shown above. What type of image is formed and what is its size relative to the object?

TypeSize

(A) Virtual Larger

(B) Virtual Same size

(C) Virtual Smaller

(D) RealLarger

(E) Real Smaller

9)(20 points) A thin convex lens A of focal length fA = 10 cm is positioned on an x-axis as shown below. An object of height 5 cm, represented by the arrow, is positioned 15 cm to the left of lens A.

a)On the figure below, draw necessary rays and sketch the image produced by lens A.

b)Calculate the location of the image produced by lens A.

c)Calculate the height of the image produced by lens A.

A second thin lens of focal length fB = 10 cm is now positioned 10 cm to the right of lens A, shown below.

d)Use a ray diagram to determine the location of the final image produced by the combination of lenses.

e)Describe the image (upright/inverted, enlarged/reduced/neither).

10)(15 points) Your teacher hands you a lit candle, a converging lens mounted on an upright lens holder, a small, upright, movable screen, and a tape measure. Explain how you could measure the focal length of the lens using only these materials. Make sure to specify any measurements or calculations that you will need to make in order to determine this.

Sketch your experiment setup below.