A real object is place to the left of a converging lens and an image forms. Then, to the right of the converging lens a diverging lens is placed. A real, inverted final image forms to the right of the diverging lens. Which of the following could give this result?
a. An upright virtual image caused by the first lens forms between the two lenses.
b. An inverted real image caused by the first lens forms between the two lenses.
c. A real, upright image was formed by the first lens to the right of where the diverging lens is to be placed.
d. A real, inverted image was formed by the first lens to the right of where the diverging lens is to be placed.
[Ques. 2] A convex lens has a focal length of magnitude F. At which of the following distances from this lens would a real object give an inverted virtual image?
a. 1/2 F
b. 2F
c. Any value greater than 2F.
d. This cannot be done with a convex lens.
[Ques. 3] A real object is place a distance d from a converging lens. The object is then moved to a distance 2d from the converging lens. Which of the following statements is false?
a. The image in the first case with the object at distance d can be the larger one.
b. The image in the second case with the object at distance 2d can be the larger one.
c. If both images are real, the image in the second case is smaller.
d. If the image in the first case is real, the image in the second case is upright.
[Ques. 4] A concave mirror has radius R. When an object is located a distance 2R from the lens, which describes the image formed?
a. real, inverted, diminished
b. real, inverted, enlarged
c. virtual, upright, diminished
d. real, inverted, of equal size
[Ques. 5] An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2 . Both positive radii are measured from the same side with R1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
a. This is a converging lens.
b. This is a diverging lens.
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
d. This is neither, since a lens cannot be made this way.
[Ques. 6] A lens of 15.0-cm focal length is placed 21.0 cm to the right of the object and a mirror of focal length 22.0 cm is placed 59.0 cm to the right of the lens. Where is the image formed by the mirror?
a. 3.9 cm to the right of the mirror
b. 15.5 cm to the left of the mirror
c. 9.2 cm to the left of the lens
d. 5.0 cm to the right of the mirror
e. 5.0 cm to the left of the mirror
[Ques. 7] A concave mirror with focal length 16.0 cm is placed 45.0 cm to the left of the object. A convex lens of focal length 15.0 cm is placed 6.0 cm to the right of the object. Where is the image formed by both the mirror and the lens?
a. 9.5 cm to the right of the object
b. 35.1 cm to the right of the lens
c. 15.5 cm to the right of the object
d. 37.9 cm to the right of the lens
e. 16.0 cm to the right of the lens
[Ques. 8] An object is placed 27.0 cm to the left of a lens of focal length 17.0 cm. 39.0 cm to the right of this lens is a plane mirror. Where does the final image form?
a. 6.9 cm to the right of the mirror
b. 6.9 cm to the left of the mirror
c. 32.1 cm to the left of the lens
d. 45.9 cm to the left of the lens
e. 28.6 cm to the left of the mirror
[Ques. 9] An image is formed using a convex lens, the image being 15 cm past the lens. A second lens is placed 25 cm past the first lens and another image is formed, this time 10 cm past the second lens. Which of the following statements is always true?
a. Both of the lenses have positive focal lengths.
b. The first lens is diverging, and the second is converging.
c. The first lens is converging, and the second is diverging.
d. None of the above statements is true.
[Ques. 10] A contact lens is made of plastic with an index of refraction 1.50 . The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm. What is its focal length?
a. 4.60 cm
b. +1.53 cm
c. +2.57 cm
d. +4.60 cm
e. 2.57 cm
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