Question

question 3 (1 point)
(03.02 mc)
what would be the magnification of a specimen viewed with a compound light microscope that has an objective power of 40x and an ocular lens power of 10x?
○ a 400x
○ b 50x
○ c 500x
○ d 40x

question 4 (1 point)
(03.02 mc)
which is a difference between a compound light microscope and a scanning electron microscope?
○ a the scanning electron microscope can view the internal part of a cell, while the compound light microscope views the surface of a cell
○ b the scanning electron microscope specimens can be stained for contrast, while the compound light microscope specimens appear black and white.
○ c the scanning electron microscope is used for dissection, while the compound light microscope is not
○ d the scanning electron microscope uses an electron beam and a layer of gold to view the surface of the cell, while the compound light microscope uses light and lenses.

Explanation:

Question 3 (assuming the question is about microscope magnification)

Step1: Recall magnification formula

The total magnification of a compound light microscope is the product of the objective lens power and the ocular lens power. The formula is \( \text{Total Magnification} = \text{Objective Power} \times \text{Ocular Power} \).

Step2: Identify given values

From the problem, the objective power is \( 40\times \) and the ocular lens power is \( 10\times \).

Step3: Calculate total magnification

Substitute the values into the formula: \( 40\times10 = 400\times \).

• Option a: Compound light microscopes can view internal parts (with proper staining) and SEM views surface, so a is wrong.
• Option b: SEM specimens are often black and white, and compound light can show color (with proper staining), so b is wrong.
• Option c: Both can be used for dissection? No, SEM is for detailed surface analysis, compound light for general cell viewing. So c is wrong.
• Option d: SEM uses electron beams and a grid, compound light uses light and lenses. This matches the differences.

Answer:

400x (assuming option a is 400x)

Question 4