If I understand your question correctly then it would be an optical zoon
Small crystals, invisible without magnification.
It is of 45x objective and 10x of eyepiece total 450x
to enable one to read something that is too small without magnification
Quality control in microbiology will help you have credible results. Without quality control, you can easily contaminate your research and come to the wrong conclusion.
MP=(d/L)*(1-(L-l)f) where d would be the distance from the eye to the image without a lens L is the distance from the eye to the new virtual image (with a lens) l is the distance from the eye to the lens this equation only covers a single lens (whereas there tend to be two in a microscope), but that's no worry; use it twice! (i.e treat both lenses as independent sources of the image)
Empty Magnification
yes
Microscopic
Yes. But you will lose signal quality (decreased brightness and increased interference) without an amplifier.
It is a balance of both. Without the magnification, we wouldn't be able to see very far. But without the ability to gather and make out trace amounts of light, we wouldn't be able to make anything out while looking through the magnification.
The purpose of the production possibilities frontier is that a combination of goods produced will utilize full quality. And also, the production of goods are cannot be increased without increasing its quality.
Some extrusive igneous rocks have individual mineral crystals that are too small to be seen without magnification.
Mere magnification without added detail is scientifically useless, just as endlessly enlarging a small photograph may not reveal any more detail, but only larger blurs. The usefulness of any microscope is that it produces better resolution than the eye. Resolution is the ability to distinguish two objects as separate entities, rather than seeing them blurred together as a single smudge.
to see things they cannot see normally without magnification
The different levels of magnification. It makes it easier for you to recognize the magnification you want without having to read the numbers on the side.
A longitudinal incision in the epineurium of a nerve without injuring the fasicles usually performed with magnification.
Small crystals, invisible without magnification.