# Cell structure and microscopy Flashcards

How big are animal cells?

Animal cells are between 0.01mm and 0.05mm.

How big are plant cells?

Plant cells are between 0.01mm and 0.1mm.

What is the smallest size a human eye can see?

0.05mm

What is another word for eyepiece lens?

Another word for an eyepiece lens is an ocular.

What is an objective lens?

The objective lens is the one closest to the specimen, has a very short focal length, and produces a greatly magnified image.

What is a compound microscope?

A compound microscope is one with two lenses, the objective lens, and the eyepiece lens.

What is the focal length?

The focal length is the distance from the centre of the lens to the focal point.

What is the lens used in a microscope called?

The lens in a microscope is called convex.

What is the eyepiece lens?

The eyepiece lens is the one at the top of a compound microscope. Larger focal length than the objective lens. Magnifies image produced by the objective lens.

What is meant by magnification?

Magnification is the amount that something has been scaled up when viewed in a microscope.

What is the most common magnification of an eyepiece?

The most common magnification of an eyepiece is x10.

What is the formula for finding the magnification of a microscope?

Magnification objective lens x magnification eyepiece lens.

What is the formula for working out the magnification of an image?

Size of image / real size of image.

What is the division of a nanometer as a fraction and standard form?

1/000,000,000 metre.

1x 10-9

What is the division of a micrometer as a fraction and standard form?

1/1,000,000 metre

1x 10-6