1) The magnifying power of the compound microscope is the product of the magnification of the objective lens and _________. a) Eyepiece b) Arm c) Reflector d) Body tube 2) If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be__________. a) a. equifocal. b) b. totifocal. c) c. parfocal. d) d. optifocal. 3) 6. Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed? a) a) Eyepiece lens b) b) Objective lens c) c) Condenser lens d) d) Magnifying lens 4) As the magnification of a series of objective lenses increases, the working distance __________. a) increases. b) decreases. c) stays the same. d) cannot be predicted. 5) The greatest resolution in light microscopy can be obtained with ________________. a) longest wavelength of visible light used b) shortest wavelength of visible light used 6) A microscope that exposes specimens to ultraviolet, violet, or blue light and forms an image with the light emitted at a different wavelength is called a ___________microscope. a) phase-contrast b) dark-field c) scanning electron d) fluorescence 7) A 45x objective and a 10x ocular produce a total magnification of _______. a) 900x. b) 55x. c) 450x. d) 145x. 8) The instrument that produces a bright image of the specimen against a dark background is called ____________ microscope. a) phase-contrast b) electron c) bright-field d) dark-field 9) Small internal cell structures are best visualized with a ______________. a) light microscope. b) dark-field microscope. c) transmission electron microscope. d) scanning electron microscope. 10) Scanning electron microscope is most often used to reveal ____________. a) surface structures. b) internal structures. c) both surface and internal structures simultaneously. d) either surface or internal structures, but not simultaneously.

Chapter 3.1- Microscopy

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?