Minimum cell size seen under light microscope is

Options

A. `1 mum`
B. `0*1 mum`
C. `0*25 mum`
D. `0*5 mum`

Answer

To determine the minimum cell size that can be seen under a light microscope, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the minimum size of a cell that can be observed using a light microscope.

2. **Consider the Size Range of Cells**: It's important to know that different types of cells have varying sizes. For example, bacteria and organelles like mitochondria are among the smallest cells and structures.

3. **Identify the Size of Smallest Cells**: Bacteria and mitochondria typically range around 0.5 micrometers in width. This is a critical point as it indicates the lower limit of visibility under a light microscope.

4. **Recognize the Limitations of Light Microscopy**: Light microscopes work based on the wave nature of light. When objects are smaller than a certain size, the details become obscured, and they cannot be clearly observed.

5. **Determine the Minimum Size**: Based on the information about the size of bacteria and mitochondria, we conclude that the minimum cell size that can be seen under a light microscope is approximately 0.5 micrometers.

6. **Select the Correct Option**: From the given options:
- a) 1 micrometer
- b) 0.1 micrometer
- c) 0.25 micrometer
- d) 0.5 micrometer
The correct answer is option D, which is 0.5 micrometer.

### Final Answer:
The minimum cell size seen under a light microscope is **0.5 micrometer** (Option D).

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