It is possible to view living specimens with a transmission electron microscope. True or False?

If a compound microscope has an eyepiece lens that magnifies 10 times and an objective lens that magnifies 50 times, the specimen will appear to be 500 times larger than it actually is. True or False?





A scanning electron microscope forms an image of specimens that can be viewed on a video screen. True or False?





A disadvantage of the scanning tunneling microscope is that it cannot be used to view living cells. True or False?It is possible to view living specimens with a transmission electron microscope. True or False?
All 3 statements are true.





A note on the last statement. A scanning tunneling microscope cannot be used to view living tissue because the preparation necessary in order to view the speciman on such a microscope kills the cell(s). Is this a disadvantage? Not necessarily. We're not talking about killing an entire organism to get some pretty fantastic and informative images. Just a few cells or tissue samples. Great for looking at viruses too.It is possible to view living specimens with a transmission electron microscope. True or False?
false, beacuse elctroin microscopes require the spceicmen to be dead. in this type fo microscope it gives a 3 diminal image by the ';bounsing back'; of the electrions off a metalic surface put ontop of the DEAD organism.
False because because the specimen would need to be in a vacuum.





True 50X10=500





True because you can't look through a lens using a SEM. It's bouncing electrons off a specimen.





I'm saying true.
TRUE


TRUE


FALSE specimen must be fixed and then it is typically sliced in ultrathin sections.
False. It has to be dead, sliced thin so that electrons can go through
true


true


true