Safe Handling and Care of Optical Instruments The Microscope

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. How should a light microscope be carried safely from one bench to another?

   • A. With one hand holding the arm, like carrying a bucket
   • B. With one hand on the arm and the other hand supporting the base from underneath
   • C. With both hands holding the eyepiece and the stage
   • D. With one hand under the base only, held away from the body

2. 2. Which objective lens should you click into position first when you begin to focus a specimen?

   • A. The highest power objective lens
   • B. The lowest power objective lens
   • C. Any lens, as long as the mirror is turned
   • D. The lens that is the longest

3. 3. Why must you never lower the objective lens while looking through the eyepiece?

   • A. The mirror will stop reflecting light
   • B. The image will become too bright to see
   • C. You cannot judge how close the lens is to the slide, so it may crush the slide and scratch the lens
   • D. The fine adjustment knob will stop working

4. 4. Wanjiru's microscope lens is dusty and no lens tissue is nearby. What is the correct action?

   • A. Wipe it with her cotton laboratory coat
   • B. Wipe it gently with her clean finger
   • C. Ask the teacher or technician for lens tissue
   • D. Wipe it with a paper towel using hard circular strokes

5. 5. Name the part of the microscope that is the lens positioned closest to the specimen.

   Type your answer in the lesson.

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