| A | B |
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| An object is placed 14.0 cm from a diverging lens. If a virtual image appears 10.0 cm from the lens on the same side as the object, what is the focal length of the lens? | -34 cm |
| Which of hte following is a device that produces an intense, nearly parallel beam of coherent light? | laser |
| When light passes at an angle to the normal from one material into another material in which its speed is higher, | it is bent away from the normal to the surface. |
| An object is placed 20.0 cm from a thin converging lens along the axis of the lens. If a real image forms behind the lens at a distance of 8.00 cm from the lens, what is the focal length of the lens? | 5.71 CM |
| The acronym laser stands for light amplification by ____ emission of radiation. | stimulated |
| Atmospheric refracion of light rays is responsible for which of the following effects? | mirages |
| A ray of light in air is incident on an air-to-glass boundary at an angle of exactly 30.0° with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray within the glass with respect to the normal? | 18.0 |
| In a laser, all of the following forms of energy can be converted into coherent light except | nuclear energy |
| Refraction is the bending of a wave disturbance as it passes at an angle from one _____ into another. | medium |
| A laser can be used | to measure distance, to read bar codes, to treat glaucoma, all of these. |
