| A | B |
|---|
| Which of the following is a device that produces an intense, nearly parallel beam of coherent light? | laser |
| The acronym laser stands for light amplification by _____ emission of radiation. | stimulated |
| A laser can be used | to treat glaucoma, to measure distance, to read bar codes and all of these. |
| What are the two features of light that change when light moves from one transparent medium into another transparent medium? | The speed of light, the medium |
| If the angle of incidence is 65.0 degree and n,>n, does a light ray bend toward or away from the normal? | bends away from the normal |
| A light ray passes from benzene (n=1.501) into ice )n=1.309). Does the light ray bend toward or away from the normal? | bends toward the normal |
| What is the position and kind of image produced by the lens shown above? | real + smaller image, and inverted |
| The focal length for a converging lens is | always positive |
| 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. |
