Question

Emphasis Heading 1 Heading 2 b. With a compound microscope, which objective lens would you use to initially locate a specimen? (1 ) C. Mary is using the high-oil objective to view a strand of her hair. What is the total magnification at which she is viewing her strand of hair? (1 pt) d. Which part of a compound microscope is the flat platform on which microscope slides with mounted specimens are placed for viewing? (1 pt) e. Which part of a compound microscope varies the amount of light that is concentrated onto the viewed specimen? (1 t) f. The ability to distinguish detail that allows one to see viewed object with clarity is known as: (1 pt) 2. What is field of view? Which objective (low-or high-power dry objective) provides the largest field of view? (2 ) h. What is depth of field? (1 pt) i. Describe how an image on a slide moves when it is placed on a compound microscope. (How does the image move when slide is moved to right? Len? Up? Down? (2 ) sh (United States Focus I

Answer 1

Answer:

Answer for question "b": when using a compound microscope, always use a low magnification objective lens for first locating the specimen. the 10X and 4X objective lenses are used to initially locate the sample.

Explanation: lower magnification allows for better locating the sample in the slide and after that one can locate the exact area where higher magnification should be applied and move the slide accordingly.


Answer for question "c": The total magnification at which Mary is viewing her strand of hair is 1000X.

Explanation: The magnification of the high oil objective is 100X and the magnification of the ocular lens is 10X. So the total magnification is 100X multiplied with 10X = 1000X

Answer for question "d":- The part of a compound microscope is also a flat platform on which a microscope slide with a mounted specimen is placed for viewing is known as "Stage".

Explanation: The stage is the part of the compound microscope where the slide is placed and there are clips to hold the slide in position

Answer for question "e": Iris diaphragm varies the amount of light that is concentrated onto the viewed specimen.

Explanation: The diaphragm has varied size holes that can control the amount of light that reaches the specimen. Too much light sometimes causes trouble for the viewer as the image is devoid of minute details, again too little light is insufficient to view a sample. So, it is very important to control the amount of light reaching the sample depending on the specimen.

Answer for question "f": The ability to distinguish detail that allows one to see viewed objects with clarity is known as resolving power.

Explanation: the resolving power of the microscope is the ability of that microscope to distinguish between two close points. The less the resolving power the higher the magnification.

Answer for question "g": the field of view is the open area that is viewed or observed via an optical instrument or eye.
We will observe the largest field of view using low power objectives. For example, the 4X objective gives the largest field of view.

Explanation: As the magnification is low, the field of view is higher.


Answer for question "h": The depth of field is the distance between the closest and the most distant object plane in focus.

note: the depth of field decreases as the magnification increases.

Answer for the question "i": The image moves in the opposite direction to the movement of the slide.
when we move the slide to the right, the image moves to the left.
when we move the slide to the left, the image moves towards the right.
When the slide is moved up, the image moves down.
When the slide is moved down, the image moves up.

Explanation: The image we observe is actually inverted. So any movement in a direction moves the image in the opposite direction.