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| 1 | A lens that is thinner in the middle than it is at the edges will be a converging lens. |
 | A) | True |
| B) | False |
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| 2 | A plano-concave lens has a virtual focus. |
| A) | True |
| B) | False |
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| 3 | Both surfaces of a converging meniscus lens should be reckoned as positive, according to convention. |
| A) | True |
| B) | False |
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| 4 | Virtual images are formed on the same side of the lens as the object. |
| A) | True |
| B) | False |
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| 5 | The overall magnification of a compound optical instrument is equal to the product of the magnifications of the component lenses. |
| A) | True |
| B) | False |
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| 6 | Chromatic aberration is a lens defect in which the extreme rays are brought to a focus nearer the lens than those rays entering near the optical center of the lens. |
| A) | True |
| B) | False |
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| 7 | According to convention, the object distance is reckoned as negative when it is measured to a virtual object. |
| A) | True |
| B) | False |
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| 8 | All images formed by diverging lenses are virtual, diminished, and erect. |
| A) | True |
| B) | False |
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| 9 | In a simple microscope, the greatest magnification occurs as the object gets closer and closer to the lens surface. |
| A) | True |
| B) | False |
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| 10 | Whenever the object is beyond the focal point of a converging lens, the magnification will always be negative. |
| A) | True |
| B) | False |
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| 11 | Images formed from real objects by diverging lenses are always |
| A) | virtual |
| B) | enlarged |
| C) | inverted |
| D) | real |
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| 12 | A diverging lens may not have |
| A) | a negative focal length |
| B) | a positive focal length |
| C) | one plane surface |
| D) | one convex surface |
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| 13 | For a compound microscope, the image formed by the eyepiece is |
| A) | real |
| B) | inverted |
| C) | erect |
| D) | diminished |
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| 14 | A negative magnification always means that the image is |
| A) | erect |
| B) | real |
| C) | virtual |
| D) | inverted |
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| 15 | Which of the following is not characteristic of images formed by real objects located inside the focal point of a converging lens? |
| A) | Virtual |
| B) | Erect |
| C) | Real |
| D) | Enlarged |
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| 16 | A meniscus lens has a convex surface of curvature 20 cm and a concave surface of curvature -30 cm. If the lens is constructed from glass (n = 1.5), the focal length will be |
| A) | -4 cm |
| B) | +4 cm |
| C) | -120 cm |
| D) | +120 cm |
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| 17 | An object is located 10 in. from a thin converging lens whose focal length is 30 in. The image distance is approximately |
| A) | -7.5 in. |
| B) | +7.5 in. |
| C) | 15 in. |
| D) | -15 in. |
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| 18 | A diverging meniscus lens has a focal length of -20 cm. If the lens is held 10 cm from the object, the magnification is |
| A) | -0.667 |
| B) | +0.667 |
| C) | -2 |
| D) | +2 |
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| 19 | A plano-convex lens is ground from glass (n = 1.5). If the focal length is to be 20 cm, the radius of the curved surface should be |
| A) | 10 cm |
| B) | 20 cm |
| C) | 30 cm |
| D) | 40 cm |
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| 20 | A 6-ft-high image is projected on a screen located 40 ft from a converging lens. If the object size is 0.2 ft, the focal length must be |
| A) | 0.736 ft |
| B) | 1.29 ft |
| C) | 1.38 ft |
| D) | 2.79 ft |
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| 21 | Images formed by diverging lenses are always , , and in size. |
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| 22 | The of a lens is the distance from the optical center of the lens to either focus. |
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| 23 | An object at a distance beyond twice the focal length of a convex lens forms an image that is , , and in size. |
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| 24 | The object distance and the image distance are considered for real images and objects and for virtual images and objects. |
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| 25 | A positive magnification means that the image is , and a negative magnification means the image is . |
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| 26 | Three examples of converging lens are , , and . |
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| 27 | A converging lens is in the middle than at the edges, whereas a diverging lens is in the middle. |
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| 28 | A ray parallel to the axis passes through the of a converging lens or appears to come from the of a diverging lens. |
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| 29 | A(n) image is formed on the same side of the lens as the object; a(n) image is formed on the opposite side. |
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| 30 | A ray that passes through the of a lens will not be deviated. |