Parts of a light microscope

Question 0

Coarse Adjustment Knob

What should we not do with this knob?

Answer 0

Moves the stage up and down for focusing; primarily use this to focus on your specimen; do NOT use this on high power(40x)

Question 1

Objective lenses

Answer 1

After the light passes through the specimen, it enters the objective lenses; has the scanning power objective lens, low-power objective, and the high power objective. (Magnification: 4x,10x,40x)

Question 2

Eyepiece

Answer 2

Contains the ocular lens; it further magnifies an image sent from the body tube

Question 3

Light source

Where is the switch usually located?

Answer 3

Projects light upwards through the diaphragm, specimen, and the lenses; usually is a bulb or a mirror; never use direct sunlight; the switch is usually on the base of the microscope, and sometimes on the power cord

Question 4

Stage clips

Answer 4

Holds the slide in place; prevents the slide from slipping on the stage

Question 5

Nosepiece

Answer 5

Holds the objective lenses and can be rotated to adjust magnification and switch objectives

Question 6

Low power objective

Answer 6

(10x)

Question 7

Oil immersion lens

Answer 7

(100x)

Question 8

High power objective

Answer 8

(40x)the longest objective

Question 9

Base

Answer 9

Supports the microscope; the bottom part of a microscope; put the palm of your hand under the base to support microscope when carrying it

Question 10

Why can we never use direct sunlight as a light source?

Answer 10

The sunlight may damage your eyes

Question 11

Diaphragm

Answer 11

The part of a microscope that you can adjust or regulate the amount of light that goes through the specimen ( ranges from 1-5 with 5 being the most light)

Question 12

Scanning power objective lens

Answer 12

Had a magnification of (4x) and is the shortest objective

Question 13

Arm

Answer 13

Used to support the microscope when carried; the correct place to grip when carrying microscope

Question 14

What is the equation for the total magnification obtained in the microscope?

Answer 14

The product of the eyepiece times the objective lens;

Question 15

Fine Adjustment Knob

When do you use this?

Answer 15

Moves the stage slightly to sharpen or FINE tune the image; used for minute focusing; use this after you have focused after the coarse adjustment knob

Question 16

Body tube

Answer 16

Allows the light from the objective to pass upward to form the first magnified image; that image is further magnified by the eyepiece or ocular

Question 17

What is the magnification of the eyepiece or ocular lens?

Answer 17

It contains a magnification of 10x