Multiple Choice
In a compound light microscope, which part is responsible for holding the specimen slide in place during observation?
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9. Microscopes
Introduction to Microscopes
Multiple Choice
One primary advantage of light microscopy over electron microscopy is that:
A
it can visualize structures smaller than 0.1 nm
B
it provides higher resolution images
C
it requires a vacuum environment for operation
D
living specimens can be observed
Verified step by step guidance1
Step 1: Understand the fundamental differences between light microscopy and electron microscopy. Light microscopy uses visible light to illuminate specimens, while electron microscopy uses beams of electrons.
Step 2: Recall that electron microscopy generally provides much higher resolution than light microscopy, allowing visualization of structures smaller than 0.1 nm, which light microscopy cannot achieve.
Step 3: Recognize that electron microscopes require a vacuum environment to operate because electrons can be scattered by air molecules, whereas light microscopes do not require such conditions.
Step 4: Consider the impact of specimen preparation: electron microscopy often requires extensive preparation, including fixation and dehydration, which typically kills the specimen, while light microscopy can be used to observe living specimens in real time.
Step 5: Conclude that the primary advantage of light microscopy over electron microscopy is its ability to observe living specimens, which is not possible with electron microscopy due to its operational requirements.
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