Question

jack wants to view a slide of chalk dust. he is looking through the microscope, but he can’t see a thing. it is completely dark. select all the possible answers for jack to solve his problem.
the diaphragm is on the wrong opening.
the slide is not above the opening in the stage.
the body is too far from the specimen/stage.
the objective lens is not clicked into place.

Explanation:

• The diaphragm is on the wrong opening: The diaphragm controls light passing through the stage. Wrong opening means no light reaches the eyepiece, causing darkness.
• The slide is not above the opening in the stage: If the slide isn't over the stage opening, light can't pass through the specimen (chalk dust), so the field is dark.
• The objective lens is not clicked into place: An unaligned objective lens may block light or not focus it, resulting in a dark view.
• The body is too far from the specimen/stage: This relates to focus (blurriness) rather than darkness. So this is incorrect.

Answer:

A. The diaphragm is on the wrong opening.
B. The slide is not above the opening in the stage.
D. The objective lens is not clicked into place.