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Varvara68 [4.7K]
2 years ago
11

What does it mean to have parfocal objectives?

Biology
1 answer:
choli [55]2 years ago
5 0

There is a significant difference between parfocal objectives and objectives that are not. Having parfocal objectives means that the sample remains in focus when the objectives are changed.

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The most significant characteristic of parfocal objectives is that the image or sample under observation remains focused even when changing objectives.

When you are focussing a sample using a low-power objective and want to change to a higher one, you do not need to refocus anymore. And if you do, the adjustment is minimal. The focus keeps being the same because the distance between the image and the lens remains the same.

This characteristic turns to be convenient because

  • <em>it avoids spending time focusing, </em>
  • <em>it prevents contact between the lens and the coverslip. </em>

---------------------------------------------

Related link: brainly.com/question/2475359?referrer=searchResults

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Hi can someone please help me with these 3 questions!!!!
balandron [24]

The dependent variable being measured in the preceding plant experiment, “How Plants Grow In Response to Light,” is the plant's growth. The independent variable is how the plant grows in response to variations in the amount of light it receives.

<h3>What is florist hypothesis?</h3>

The independent variable is how the plant grows in response to variations in the amount of light it receives.

Determine the variable that will be altered first. In this instance, the plant's exposure to light is altered. The independent variable is this.

A clear, explicit, testable assertion regarding the expected relationship between variables or the explanation for an event is called a research hypothesis (or scientific hypothesis).

Therefore, plant growth, hormone concentration, shoot and root, floral pattern development are the part of data in the hypotheses.

Learn more about florist here:

brainly.com/question/18510523

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7 0
1 year ago
Describe how anemia and leukemia affect the blood.
Vaselesa [24]
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People with severe or very severe are in risk of life threathing infections and bleeding.

Leukemia- Is a cancer to blood or bone marrow .Large numbers of white cells are produced in the bone marrow and crowd it and the bloodstream and they cannot perform the proper role of protecting and fitting against diseases.Blood has to go everywhere to bring to body what it needs, making it a stuff cancer.

Major progress and been made targeting this cancer, take the blood out of the body, separate your cancer blood from your good blood, better ways to kill only the bad blood, make more good blood faster, relax your body, mind, improved immune system.
8 0
3 years ago
The graph below shows population data for two species.
pshichka [43]

Answer:

never give up its an order if you do then so dose life

Explanation:

never give up

3 0
3 years ago
Which lobe(s) of the brain are involved in driving a motor vehicle?
sdas [7]
FRONTAL LOBE are involved in that.....
7 0
3 years ago
Describe what will occur the population if it increases in number when food is scarce?
mote1985 [20]

Answer:

more people will die

Explanation:

If you have a big population and little food mor peple will die.

4 0
3 years ago
Read 2 more answers
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