1. What is the primary function of the condenser in a microscope? A. To focus light on the specimen B. To magnify the image C. To adjust the contrast D. To hold the slide in place Answer: A. The condenser focuses light onto the specimen to enhance the clarity and contrast of the image. 2. Which objective lens provides the highest magnification on a standard light microscope? A. 4x B. 10x C. 40x D. 100x Answer: D. The 100x objective lens, when used with oil immersion, provides the highest magnification. 3. When using an oil immersion lens, what is the purpose of the oil? A. To increase the resolution by reducing light refraction B. To lubricate the lens for smoother movement C. To clean the lens D. To prevent the lens from drying out Answer: A. The oil has a similar refractive index to glass, which reduces light scattering and increases resolution. 4. What is the correct order of steps for focusing a specimen under high power? A. Coarse focus, fine focus, adjust the condenser B. Adjust the condenser, coarse focus, fine focus C. Fine focus, adjust the condenser, coarse focus D. Coarse focus, adjust the condenser, fine focus Answer: B. First adjust the condenser for proper light, then use the coarse focus, followed by the fine focus for a sharp image. 5. Which part of the microscope should be used to initially adjust the intensity of light? A. Base B. Condenser