The Microscope
(The Microscope: Question 11) What limits the amount of magnification that can be produced using light? A. the amount of light let in B. the resolving power of the microscope C. the electrons being absorbed or bounced off an object D. how much light the specimen being observed produces
B
(The Microscope: Question 15) What kind of microscope allows you to look through two eyepieces? A. scanning electron microscope B. binocular C. monocular
B
(The Microscope: Question 19) Which lens is closest to the object that you are viewing? A. ocular lens B. objective lens
B
(The Microscope: Question 5) What is the contribution made to the development of the microscope by Robert Hooke? A. first to document careful observations of different cell types B. identifying the first cell C. used mathematics to improve the focus of the lens D. created the first microscope E. discovered the electron microscope F. built microscopes capable of magnification of up to 1250 x using regular light
B
(The Microscope: Question 8) A "flea glass" is another name for a _____. A. lenses B. magnifying glass C. microscope
B
(The Microscope: Question 12) Select the five variations of the light microscope. A. the electron microscope B. the dark field microscope C. the phase contrast microscope D. the fluorescence microscope E. the polarizing light microscope F. the bright field microscope
B, C, D, E, and F
(The Microscope: Question 13) The level of magnification that produces the best images using an electron microscope is _____. A. 2,500 times B. 100,000 times C. 250,000 times D. 1,000,000 times
C
(The Microscope: Question 14) From the following list, which is a limitation to using an electron microscope? A. can only view live samples B. the limited amount of magnification C. the high expense D. short sample preparation time
C
(The Microscope: Question 3) What is one of the contributions made to the development of the microscope by Galileo? A. first to document careful observations of different cell types B. identifying the first cell C. used mathematics to improve the focus of the lens D. created the first microscope E. discovered the electron microscope F. built microscopes capable of magnification of up to 1250 x using regular light
C
(The Microscope: Question 7) What is the contribution made to the development of the microscope by Max Knott and Ernst Ruska? A. first to document careful observations of different cell types B. identifying the first cell C. used mathematics to improve the focus of the lens D. created the first microscope E. discovered the electron microscope F. built microscopes capable of magnification of up to 1250 x using regular light
E
(The Microscope: Question 2) Hans and Zaccharias Janssen have made contributions to the development of microscopes through their work with mathematics.
F
(The Microscope: Question 6) What is the contribution made to the development of the microscope by Charles A. Spencer? A. first to document careful observations of different cell types B. identifying the first cell C. used mathematics to improve the focus of the lens D. created the first microscope E. discovered the electron microscope F. built microscopes capable of magnification of up to 1250 x using regular light
F
(The Microscope: Question 1) Living creatures which can be seen only by using a microscope are called _____. A. microbes B. microorganisms C. organisms
B
(The Microscope: Question 10) What is the difference between how a light microscope magnifies an image and how an electron microscope magnifies an image? (Must type ... to get the question correct)
... (A light microscope focuses a light source at a specimen through a series of lenses. The light rays which reflect off of the object are then focused into a magnified image. Rather than focusing light at a specimen, electron microscopes utilize streams of electrons which are accelerated in a vacuum and directed at a prepared specimen. The speeding electrons are either absorbed by or bounce off the object at differing angles similar to light waves. The magnified image is then captured on an electron-sensitive plate, similar to photographs being captured on film.)
(The Microscope: Question 9) Describe how a light microscope creates a magnified image:
... (A light microscope focuses a light source at a specimen through a series of lenses. The light rays which reflect off of the object are then focused into a magnified image.)
(The Microscope: Question 16) What part of a microscope rotates to change from the low power objective lens to the high power objective lens? A. resolving nosepiece B. coarse adjustment knob C. fine adjustment knob
A
(The Microscope: Question 17) When are you never supposed to use the coarse adjustment knob? A. when using the high power objective B. when using the low power objective
A
(The Microscope: Question 18) Which lens is closest to your eye when looking through a microscope? A. ocular lens B. objective lens
A
(The Microscope: Question 4) What is the contribution made to the development of the microscope by Anton van Leeuwenhoek? A. first to document careful observations of different cell types B. identifying the first cell C. used mathematics to improve the focus of the lens D. created the first microscope E. discovered the electron microscope F. built microscopes capable of magnification of up to 1250 x using regular light
A
