lab prelim

Question 1

instrument that consists of at least two magnifying lenses to
produce an enlarged and focused image of a specimen, the ocular
and the objective

Answer 1

compound micr

Question 2

The total magnification of any set of lenses is determined by
multiplying the magnification of the objective by the magnification of
the ocular.

Answer 2

compound microscope

Question 3

This is the cylindrical tube
structure that holds the eyepiece.

Answer 3

draw tube

Question 4

It consists of the compound lens at
the end of the draw tube, which usually
magnifies from 5 to 15 times. This is also
called the ocular, where the observer peeps
through to see the specimen.

Answer 4

eyepiece

Question 5

This is bigger tube located below
the draw tube. It allows significant distance
between the lens of the eyepiece and the lens
of the objective.

Answer 5

body tube

Question 6

This is the circular part that
protects the objectives from dust.

Answer 6

dust shield

Question 7

This is the
rotating part below the dust shield,
which facilitates the use of the
objectives.

Answer 7

revolving nose piece

Question 8

• Magnification Range: 4x to 10x

Answer 8

Low-power objective (LPO).

Question 9

Observing larger specimens, getting a
general sample overview, and locating areas of interest
for higher magnification.

Answer 9

Low-power objective (LPO).

Question 10

• A larger lens with a lower magnification power.
• Wider field of view (how much you can see at once).
• It is shorter in length compared to higher-power
  lenses

Answer 10

Low-power objective (LPO).

Question 11

• Magnification Range: 20x to 40x

Answer 11

Medium-power objective lens (MPO)

Question 12

Typical Uses: More detailed examination of specimens,
studying cell structures and smaller microorganisms.

Answer 12

Medium-power objective lens (MPO)

Question 13

• A moderate-sized lens with a medium magnification
  power.
• Provides a balance between magnification and
  resolution.
• More precise details compared to low-power lenses.

Answer 13

Medium-power objective lens (MPO)

Question 14

• Magnification Range: 40x to 100x or more

Answer 14

High-power objective lens (MPO)

Question 15

Typical Uses: Detailed examination of tiny structures,
studying individual cells, bacteria, or small particles.

Answer 15

High-power objective lens (MPO)

Question 16

A smaller lens with a higher magnification power.
* Higher numerical aperture (NA) for better resolution
and clarity.
* Requires careful focusing and handling due to higher
magnification.

Answer 16

High-power objective lens (MPO)

Question 17

Magnification Range: 100x more

Answer 17

Oil-Immersion Objective objective lens (OIO)

Question 18

Typical Uses: Examining microscopic structures and observing
details at the cellular level.

Answer 18

Oil-Immersion Objective objective lens (OIO)

Question 19

Characteristics and specifications
* It is used with a unique immersion oil to improve
resolution by reducing light refraction.
* Highest magnification power among the objective
lenses.

• Requires a drop of oil to be placed on the specimen
  for optimal performance.

Answer 19

Oil-Immersion Objective objective lens (OIO)

Question 20

This knob is rotated until an
image appears. It is used for appropriate focusing. This
could remove the body tube or the stage up or down,
depending on the model of the microscope.

Answer 20

Coarse adjustment knob.

Question 21

this smaller knob is rotated
until the image becomes clear and well-defined. It is
used for fine focusing.

Answer 21

Fine adjustment knob.

Question 22

. This is held by the right hand, if the microscope is
being carried. The left hand should support the base.

Answer 22

Armq

Question 23

This is the platform where the microscopic slide or
specimen is placed.

Answer 23

Stage.

Question 24

are used to secure the slide
or specimen in older models.

Answer 24

Stage clips

Question 25

performs the same functions, which only requires rotation of two screws to move the slide forward, backward, or sideward.

Answer 25

mechanical stage

Question 26

is the part of the substage composed of a system of metal blades which can be manipulated, using a lever.

Answer 26

Iris diaphragm.

Question 27

This is the part of the substage composed of a system of lenses is used to concentrate light.

Answer 27

Abbe condenser

Question 28

The plane surface is used with daylight illumination and the concave surface is used with artificial illumination.

Answer 28

Mirror.

Question 29

This part is used to tilt the microscope.

Answer 29

Inclination joint.

Question 30

This is a short part connected to the base and upper parts of the microscope. It is used to support the upper parts of the microscope.

Answer 30

PillaR

Question 31

This is the U, Y or V-shaped metal part supporting the whole microscope.

Answer 31

Base