Biology - Measuring Organisms Under the Microscope Lab

Originally Posted by jchen (Post 19814)

Name of object: Boletus
Measurement of Object: 250 micrometers
Measurement of the low-power field diameter: 4 mm or 4000 micrometers
Low-power magnification: 4X
High-power magnification: 40X

4X implies I see the X object 4 times with more detail.

If I have a 4000 micrometer diameter when I'm lookin at 4X position (Low-power), when I see at the 40X position (High-Power), I see things 10 times bigger, so I see 10 times with more detail, so my 40X diameter is 400 micrometer (I see 1/10 of the original surface)
Remember: to see 10 times better is seen 1/10 of the original surface.
Remember googlemaps: Always when you ask for more detail you see less surface but in more detail.


Questions
1. How many micrometers are in 1 mm? 1000 micrometers :good:
2. How many micrometers are in 1 meter? 1 million micrometers :good:
3. What happens to the field of view when you change from low-power magnification to high-power magnification? :?: This is the main point. Be carefull!! It's a microscope. When you use "magnification", you're making things BIG, that is, you change from 4000 micrometers to 400 micrometres (you make thing 10 times bigger, that is, you see 1/10 of the original micrometers).
Answer: The field of view becomes 10 times bigger, that is I see 1/10 of the original surface, seeing the details.
4. How many times is the magnification increased when you change from low-power to high-power magnification? :?:10 times (from 4x to 40x)
5. How many times is the diameter of a field decreased when you change from low-power to high-power magnification? :?: 10 times (from 4000 micrometers to 400 micrometres )


1. Approximately 500 of a certain type of bacteria can fit across your low-power field of vision. What is the approximate size of 1 bacterium? Approximately 8 micrometers :good:
2. Approximately 7 of a certain type of protist can fit across your high-power field of vision. What is the approximate size of 1 protist? Approximately 571 micrometers :bad: High-power diameter: 400 micrometers. when 7 must fit, --> aprox 57 micrometers

3. If a microscope has a low-power magnification of 100X, a high power of 600X, and a low-power field diameter of 1800 micrometers, what is the high-power field diameter in micrometers? :?: high(600X) is 6 times bigger as low(100X) so if Low has 1800 micrometers, high is 1/6 --> 300 micrometers

4. If 20 objects fit across a low-power field of view whose field diameter is 3000 micrometers, what is the approximate size of each object? Approximately 150 micrometers:good:

Originally Posted by jchen (Post 19814)

Name of object: Boletus
Measurement of Object: 250 micrometers
Measurement of the low-power field diameter: 4 mm or 4000 micrometers
Low-power magnification: 4X
High-power magnification: 40X

Questions
1. How many micrometers are in 1 mm? 1000 micrometers :good:
2. How many micrometers are in 1 meter? 1 million micrometers:good:
3. What happens to the field of view when you change from low-power magnification to high-power magnification? drops by a factor of 10 to 400microns
4. How many times is the magnification increased when you change from low-power to high-power magnification? increases by a factor of 40/4
5. How many times is the diameter of a field decreased when you change from low-power to high-power magnification? !0 times


1. Approximately 500 of a certain type of bacteria can fit across your low-power field of vision. What is the approximate size of 1 bacterium? Approximately 8 micrometers :good:
2. Approximately 7 of a certain type of protist can fit across your high-power field of vision. What is the approximate size of 1 protist? Approximately 571 micrometers :good:
3. If a microscope has a low-power magnification of 100X, a high power of 600X, and a low-power field diameter of 1800 micrometers, what is the high-power field diameter in micrometers? 1800/6
4. If 20 objects fit across a low-power field of view whose field diameter is 3000 micrometers, what is the approximate size of each object? Approximately 150 micrometers

Originally Posted by blue777 (Post 40290)

Amigo, be careful with the unit used..:) (I'm reffering with "mm."). It's really confusing and still can't figure out what does it mean? Does "mm" stands for millimeter or micrometre? just check ur thread again. :) But still Good job! tnx again.