why do we need to use coverslip while viewing a specimen under microscope?

Answer 1

For small dry specimens like salt crystals you don't need a coverslip. For dry specimens that won't lie flat, like hair or fibers, the coverslip presses them flat so that they lie in one plane and can be viewed more easily. This is necessary because the depth of field (the vertical range that is in focus at any one time) is extremely small for a microscope. For wet specimens such as protozoans in a drop of water, the cover slip spreads the specimen into a thin layer, again keeping the specimens more or less in one plane. And it also prevents the objective lens from being immersed in the liquid.

Answer 2

For small dry specimens like salt crystals you don't need a coverslip. For dry specimens that won't lie flat, like hair or fibers, the coverslip presses them flat so that they lie in one plane and can be viewed more easily. This is necessary because the depth of field (the vertical range that is in focus at any one time) is extremely small for a microscope. For wet specimens such as protozoans in a drop of water, the cover slip spreads the specimen into a thin layer, again keeping the specimens more or less in one plane. And it also prevents the objective lens from being immersed in the liquid.

Answer 3

For small dry specimens like salt crystals you do not elect a coverslip. For dry specimens that isn't lie flat, like hair or fibers, the coverslip presses them flat so that they lie in a unmarried airplane and could be seen better incredibly. that's important because the intensity of field (the vertical variety that's in concentration at anybody time) is amazingly small for a microscope. For moist specimens which comprise protozoans in a drop of water, the canopy slip spreads the specimen right into a skinny layer, back holding the specimens better or a lot less in a unmarried airplane. And it also prevents the point lens from being immersed contained in the liquid.

Answer 4

To prevent from damaging/contaminating the specimen when adjusting the microscope.

Answer 5

to keep it flat as a microscope has an incredibly thin depth of focus, and to stop it from blobbing onto the lens as you have to put it so close to the subject (and if you've never put it close enough to crack the coverslip, hence proving the point... you'll not forget doing it in a hurry)

Answer 6

Yep - to prevent contamination of specimen and microscope.

How many coverslips have you shattered with the scope lens. Me - hundreds....aaarrggg

Answer 7

for thinning it like a film to get the clear picture

Answer 8

To increase visibility.