Activity 2

Question 1

one of the most important instruments in the studying Microbiology.

Answer 1

Compound microscope

Question 2

two general categories of microscopes

Answer 2

Light microscope
Compound microscope

Question 3

The microscope that uses light waves and lenses.

Answer 3

Light microscope

Question 4

The microscope that employs electron beams and magnetic fields to produce an image.

Answer 4

Compound microscope

Question 5

Light microscopes can be classified as simple if they have a short focal length, are held close to the eye and magnify objects only up to 300X.

Answer 5

Light

Question 6

employs two separate lenses, an ocular and an objective, in order to achieve 2-5 times greater magnification.

Answer 6

Compound

Question 7

the microscopic field is brightly lighted and the object to be observed appears dark due to its ability to absorb or refract some of the incident light.

Answer 7

Black field

Question 8

the object appears luminous against a dark background since it reflects some of the incident light in all directions.

Answer 8

Dark field

Question 9

uses UV light, thereby allowing greater resolution and magnification.

Answer 9

Ultraviolet (UV)

Question 10

It is used principally to detect or even measure substances in specimens of living tissues that are known to absorb UV light at particular wavelengths.

Answer 10

Ultraviolet (UV)

Question 11

makes use of the property of certain chemical substances that release light at a different wavelength when exposed to UV rays.

Answer 11

Fluorescent

Question 12

Bacteria and other microorganisms are stained with fluorescent stain that can be detected in a microscope illuminated with UV light.

Question 13

Y or U-shaped stand that supports the microscope

Answer 13

Base

Question 14

A short piece of metal attached to the end of the base. It also supports the microscope.

Answer 14

Pillar

Question 15

The curved metallic part arising from the pillar. Used to hold the microscope.

Answer 15

Handle/Arm

Question 16

Found at the junction of the pillar and the handle. Used to tilt the microscope.

Answer 16

Inclination joint/screw

Question 17

It holds the dust shield and nosepiece with the objectives at the lower end.

Answer 17

Body tube

Question 18

The upper smaller end of the Body Tube bearing the eyepiece or ocular.

Answer 18

Draw tube

Question 19

the circular structure at the lower end of the body tube to which the objectives are attached.

Answer 19

Revolving nosepiece

Question 20

A thin circular structure above the nosepiece used to protect the lenses of the objectives

Answer 20

Dust shield

Question 21

Two pairs of wheels attached to either side of the body tube:

Answer 21

Adjustment knob
1. Course
2. Fine

Question 22

The bigger wheel used to adjust low power
objective in focusing.

Answer 22

Course Adjustment Knob

Question 23

The smaller wheel used for delicate focusing in connection with the high power and oil-immersion objectives.

Answer 23

Fine Adjustment Kob

Question 24

The paired structures on either side of the stage used to hold the slide in place.

Answer 24

Clips

Question 25

Found below the stage and attached to the pillar used to hold the mirror.

Answer 25

Mirror rack

Question 26

Found at the draw tube through which the observer peeps during actual focusing.

Answer 26

Ocular/Eyepiece

Question 27

The tube-like structures attached to the revolving nosepiece.

Answer 27

Objectives

Question 28

a. _____. The shortest tube that forms a whole view of the specimen b. _____. Slightly longer tube that forms a bigger image of the object c. _____: Next longer tube that gives a much enlarged and more detailed view of the specimen. d. _____: Another objective as long as the HPO but with a much bigger degree of magnification. Usually used when studying microorganisms. The lens is used with an immersion oil or cedar oil.

Answer 28

Scanner Low Power Objective (LPO) High Power Objective (HPO) Oil immersion Objective

Question 29

Found below the stage near the base provided with concave and plane surfaces. Used to collect and direct light to the object.

Answer 29

Mirror

Question 30

Found below the stage consisting of regularly arranged circular blades. The opening could be adjusted to regulate the amount of light reflected by the mirror on the object.

Answer 30

Iris diaphragm

Question 31

A lens found immediately beneath the hole of the stage. Used to concentrate light rays into the specimen.

Answer 31

Condenser

Question 32

The material used to clean microscope lenses

Answer 32

Lens paper

Question 33

The objective that should be in place before returning the microscope

Answer 33

Lowest linear magnification objective