| A | B |
|---|
| The focal length for a converging lens is | always positive |
| A virtual image has a _____image distance (q) and is located in ____ of the lens. | negative, front |
| The focal length for a diverging lens is | always negative |
| 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 |
| 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 |
| A film projector produces a 1.51 m image of a horse on a screen. If the projector lens is 4.00 m from the screen and the size of the horse on the film is 1.07 cm, what is the magnitude of the magnification of the image? | 14.1 |
| An object that is 18 cm from a converging lens forms a real image 22.5 cm from the lens. What is the magnification of the image? | -0.80 |
| Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle? | total internal reflection |
| Which is not correct when describing the formation of rainbows? | All wavelengths refract at the same angle. |
| In a laser, energy is added to a(n) | active medium |
