lesson 2

the high expense

From the following list, which is a limitation to using an electron microscope?

False

Hans and Zaccharias Janssen have made contributions to the development of microscopes through their work with mathematics.

used mathematics to improve the focus of the lens

What is one of the contributions made to the development of the microscope by Galileo?

first to document careful observations of different cell types

What is the contribution made to the development of the microscope by Anton van Leeuwenhoek?

built microscopes capable of magnification of up to 1250 x using regular light

What is the contribution made to the development of the microscope by Charles A. Spencer?

resolving nosepiece

What part of a microscope rotates to change from the low power objective lens to the high power objective lens?

ocular lens

Which lens is closest to your eye when looking through a microscope?

magnifying glass

A "flea glass" is another name for a .

microorganisms

Living creatures which can be seen only by using a microscope are called .

the dark field microscope the phase contrast microscope the fluorescence microscope the polarizing light microscope the bright field microscope

Select the five variations of the light microscope.

250,000 times

The level of magnification that produces the best images using an electron microscope is .

discovered the electron microscope

What is the contribution made to the development of the microscope by Max Knott and Ernst Ruska?

identifying the first cell

What is the contribution made to the development of the microscope by Robert Hooke?

binocular

What kind of microscope allows you to look through two eyepieces?

the resolving power of the microscope

What limits the amount of magnification that can be produced using light?

when using the high power objective

When are you never supposed to use the coarse adjustment knob?

objective lens

Which lens is closest to the object that you are viewing?