Question

question 21
what adjustment makes a specimen appear brighter?
○ switching from scanning to low power objective
○ opening the diaphragm
○ focus using the fine adjustment
○ increase the amount of light in the room
1 point
clear selection

Explanation:

• Switching objective lenses changes magnification, not brightness directly.
• The diaphragm controls the amount of light passing through the specimen; opening it lets more light through, making the specimen appear brighter.
• Fine adjustment focuses the image, not its brightness.
• Room light does not affect the microscope's illuminated specimen view.

Answer:

Opening the diaphragm