Parts of the microscope

Question 1

where the eyepiece is viewed through

Answer 1

Eyepiece

Question 2

is attached on top of the arm. It can be of the monocular or binocular type. It supports the eyepiece on the upper end.

Answer 2

Microscope tube

Question 3

is attached under the arm of the microscope tube. This houses the objectives and rotates them

Answer 3

Nosepiece

Question 4

is the distance between the place where the objective is inserted and the top of the drawtube into which the eyepieces fit.

Answer 4

Mechanical tube length

Question 5

Where the image of the specimen first passes through

Answer 5

Objectives

Question 6

is the measure of light-gathering power of a lens.

Answer 6

Numerical Aperture

Question 7

a high resolving power and thus useful magnification

Answer 7

Indication of high NA

Question 8

placed between the slide and the oil immersion objective to provide the best image at high magnification

Answer 8

Immersion oil

Question 9

holds the slide and allows it to be moved to the left, right, forward, or backward by rotating the knobs.
It is fitted with fine vernier graduations as on a ruler.

Answer 9

Mechanical Stage

Question 10

illuminates the specimen and controls the amount of light and contrast.

Answer 10

Condenser

Question 11

is provided below the condenser. This adjusts the NA of the condenser when using objectives having low magnifying power.

Answer 11

Iris diaphragm

Question 12

provides necessary illumination through reflection of natural or artificial light.

Answer 12

Two-sided mirror

Question 13

is built into the base of the microscope

Answer 13

Illuminator

Question 14

provides the best illumination.

Answer 14

Halogen bulb

Question 14

are used to change the light from ordinary electric bulbs into a more natural white light.

Answer 14

Blue filter

Question 15

are used to reduce brightness without changing the color of the background.

Answer 15

Neutral density filter

Question 16

may be useful in some situations.

Answer 16

Green filters

Question 17

must be used with objectives having NA more than 1.0.

Answer 17

Immersion oil

Question 18

are used to change the distance between the specimen slide and the objective.

Answer 18

Course and fine focusing knob

Question 19

changes the distance very slowly and permits better viewing of the object.

Answer 19

Fine focusing knob

Question 20

are low wattage, high intensity lamps and are the preferred light source.

Answer 20

Halogen lamp