Question

microscope use:

1. when focusing a specimen, you should always start with the _ objective.
2. when using the high power objective, only the _ knob should be used.
3. the type of microscope used in most science classes is the _ microscope.
4. you should carry the microscope by the _ and the _.
5. the objectives are attached to what part of the microscope (it can be rotated to click lenses into place?)
6. a microscope has an ocular objective of 10x and a high power objective of 50x, what is the microscopes total magnification? _

Explanation:

Step1: Determine the starting objective

When focusing a specimen, start with the low - power objective. It has a larger field of view and is easier to focus initially.

Step2: Identify the knob for high - power objective

When using the high - power objective, only the fine adjustment knob should be used. The coarse adjustment knob can move the stage too quickly and damage the specimen or the lens.

Step3: Name the common microscope

The type of microscope used in most science classes is the compound microscope. It uses two sets of lenses (ocular and objective) to magnify the specimen.

Step4: State how to carry the microscope

You should carry the microscope by the arm and the base. This provides a stable and secure way to move the microscope.

Step5: Name the part with objectives

The objectives are attached to the nosepiece. The nosepiece can be rotated to click different lenses (objectives) into place.

Step6: Calculate total magnification

The formula for total magnification of a microscope is \(M = M_{ocular}\times M_{objective}\). Given \(M_{ocular}=10\times\) and \(M_{objective} = 50\times\), then \(M=10\times50 = 500\times\)

Answer:

1. low - power
2. fine adjustment
3. compound
4. arm; base
5. nosepiece
6. \(500\times\)