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when observing a prepared bacterial smear, should the diaphragm be open or closed and why
The diaphragm moves down and contracts, flattening itself, when you inhale.
Your diaphragm
The diaphragm muscles contract and relax pulling the diaphragm down and then releasing it. When we inhale, our diaphragm muscles contracts and flattens. When we exhale, they relax and arch upwards.
Upwards, toward the head.
The condenser should be raised to the uppermost position. This maximizes the amount of light entering the objective lens and minimizes the amount lost to refraction. The diaphragm should be stopped down just enough to provide an acceptable image. The best results are usually obtained by beginning an examination on low power with the diaphragm almost completely closed.
Unlike the ocular and objective lenses, the condenser lens does not affect the magnifying power of the compound microscope The condenser can be moved up and down by a knob under the stage. A diaphragm within the condenser regulates the amount of light that reaches the slide.
It got closed down :(
when observing a prepared bacterial smear, should the diaphragm be open or closed and why
Your diaphragm lowers and your ribs expand outwards
Heat. The condenser acts through cooling with a greater surface area (on the inside of the condenser); the constant fluid flow keeps the temperature down. If you were to assemble the apparatus so that the water flows from top to bottom, the condenser would never fill up, and your reaction will have difficulty cooling down. Risky if you have volatile chemicals or a reaction that you need to keep cool.
The diaphragm moves down and contracts, flattening itself, when you inhale.
The diaphragm goes downwards.
Some microscopes have a mirror under the specimen to reflect room light up through the specimen. Others have a light bulb down there.
The diaphragm moves down when you breathe in, so your lungs will expand to take in as much oxygen as possible.
you inhale when your diaphragm contracts.
When you breath, your diaphragm moves up and down , causing air to flow into and out of the lungs .