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

Answer 1

That way when your viewing the specimen its spread out and flatter so you can view it without distortion.

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 want a coverslip. For dry specimens which couldn't lie flat, like hair or fibers, the coverslip presses them flat in basic terms so that they lie in a unmarried plane and may want to correctly be seen extra truly. it is important because the intensity of field (the vertical decision it truly is in concentration at all of us time) is amazingly small for a microscope. For moist specimens alongside with protozoans in a drop of water, the cover slip spreads the specimen right into a skinny layer, back holding the specimens extra or a lot less in a unmarried plane. And it also prevents the purpose lens from being immersed in the liquid.