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Light microscope works because light goes *through* your specimen. So if the specimen is too thick, then light won't shine through, and you won't see anything.
because the specimen is always thin
The specimen prepared for a monocular microscope must be very thin so light can pass through it easily. The light then goes through a series of lenses that magnifies the specimen to appear bigger
Thin enough for light to pass through it.
a scanning electron microscope
A specimen being viewed under a microscope should be thin so that light can pass through the specimen. The thinner it is the brighter it will be. A thick specimen will block the light and all you'll get is a dark grey image. Also, more detail can be seen in a thin specimen because there will not be parts in front of each other, blocking the view.
To see them better
Because light must pass through it.
Light microscope works because light goes *through* your specimen. So if the specimen is too thick, then light won't shine through, and you won't see anything.
because the specimen is always thin
The light is reflected upwards, and passes through the specimen. It passes through easier (clearer) if the specimen is not too thick.
The specimen prepared for a monocular microscope must be very thin so light can pass through it easily. The light then goes through a series of lenses that magnifies the specimen to appear bigger
To examine it under the microscope, the specimen needs to be illuminated by either a light underneath or a stream of electrons. If the specimen is too thick, and light or electrons cannot penetrate it, the scientist will be unable to see any detail.
Thin enough for light to pass through it.
A transmission electron microscope (TEM) is a microscope in which a beam of electrons is transmitted through an ultra-thin specimen, interacting with the specimen as it passes through it.
Cover slip
Body tissues and bones are opaque beyond a certain thickness. To view fine structures, exceedingly thin samples will be translucent, revealing cell and tissue structure.