Total magnification = Objective magnification X ocular magnification. So for 10X objective and 10X ocular, Total magnification = 10 X 10 = 100X (this means that the image being viewed will appear to be 100 times its actual size).

False magnification is when the power of the eyepieces employed pushes the maximum useful magnification above 1,000 times the numerical aperture (N.A). For example, you can achieve 1,000x magnification by using a 40x/0.65 N.A with 25x eyepieces.

Transparent objects can be lit from below and solid objects can be lit with light coming through (bright field) or around (dark field) the objective lens. The maximum magnification power of optical microscopes is typically limited to around 1000x because of the limited resolving power of visible light.

Explanation: Revolving Nosepiece or Turret: This is the part of the microscope that holds two or more objective lenses and can be rotated to easily change power (magnification).

They can survive temperatures close to absolute zero. They can withstand heat beyond the boiling point of water. They can shrug off the vacuum of space and doses of radiation that would be lethal to humans.

Mycoplasma genitalium, a parasitic bacterium which lives in the primate bladder, waste disposal organs, genital, and respiratory tracts, is thought to be the smallest known organism capable of independent growth and reproduction.

1.5 mm long

But tardigrades can have their predators too. Snails that live among the moss leaves could enjoy a meal of tardigrades (Fox 1966).

Tiny and tough Their resiliency is in part due to a unique protein in their bodies called Dsup—short for “damage suppressor”—that protects their DNA from being harmed by things like ionizing radiation, which is present in soil, water, and vegetation.