CP2 Exam 1 Questions & Answers 2024

CP2 Exam 1 Questions & Answers 2024 In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in the grating is increased, with everything else (including the slit spacing) the same, then - ANSWER-The fringes stay in the same position but get brighter and narrower. White light passes through a diffraction grating and forms a rainbow pattern on a screen behind the grating. For each rainbow, - ANSWER-the red side is farthest from the center of the screen. In the way that a magnifier is usually used, the object is placed - ANSWER-At the focal point of the lens. The magnification of a microscope is increased when - ANSWER-The focal length of the objective lens is decreased. The colors of a soap bubble or oil slick are due to - ANSWER-Thin-film interference A film of oil (index of refraction noil=1.2) floats on top of an unknown fluid X (with unknown index of refraction nx). The thickness of the oil film is known to be very small, on the order of 10nm. A beam of white light illuminated the oil from the top, and you observe that there is very little reflected light, much less reflection than at an interface between air and X. What can you say about the index of refraction of X?. - ANSWER-nx 1.2 A biologist changes the objective lens of a microscope, replacing a 20x with a 10x objective. To keep the magnification the same, the focal length of the eyepiece must - ANSWER-Be halved M=mo X Me must double, but Me is proportional to 1/fe so fe must be halved. When an object like a tree is illuminated by the sun, and you are looking toward the tree, light rays leave the object - ANSWER-From every point not he surface of the tree, and in every direction The image seen in a plane mirror is located - ANSWER-Behind the mirror.