microscope and imagery quiz

Invented the first eyeglass

Invented the compound light microscope

he named cells

Put 550 lenses in a lens tube to make a mag. of 270x; using it, he saw moving single celled organisms which he called "animalcules" because they looked like animals.

is a way to investigate new theories and learn new info about how things work

Is a theory that people had in the 1600s, that life like mold, would just "spawn" in.

Francesco Redi and Louis Pasteur

used jars with different covering on lid to prove that spontaneous generation is false

he said that spontaneous generation is true and tested it by showing that "sterile" broth would become spoiled over time.

disproved john needham's predictions and said that needham didn't cover the broth so he did the experiment again and it showed that spontaneous generation is false.

• 1. all organisms are composed of one or more cells
• 2. the cell is the smallest functional unit of life
• 3. all cells are produced from pre-existing cells

they shared experimental findings of observations of plant and animal cells and collaboratively developed the cell theory.

the number of times longer an object appears

as magnification increases, fov decreases

the difference between light and dark

the amount of detail that you can see in an image

It is a simple light microscope which can provide upto 25X before the image is distorted. A compound light microscopes can provide upto 2000X.

A beam of electrons is collided with the object and is analysed and turned into an image.

The SEM sweeps a beam of electrons the surface of an object providing a mag. of up to 500 000x. SEM images only provide a view of the surface of the object.

TEM transmits electrons through a thin slice of a sample much like a slide on alight microscope; provides a mag.upto 10million.The images are 2D slices of the sample.

The CLSM uses lasers to create a series of 2D slices of a3D object which are then combined using computer software to create a full 3D image; colour

The STM brings a fine metal "needle" near the surface of an object and allows electrons to run from the needle into the object surface. As the needle is moved accross the surface of the material information rewegarding the transfer of electrons is interpretted using a computer.STM can pick up details as small as 0.1nm.

A speaker vibrates  ore than 20000X a second to create a ultrsonic signal which penetrates the patient skin and then the reflected sound waves are gathered by a sensitive microscope.

MRI machine or scanner uses a powerful magnet and radio waves to take very clear and detailed pictures of the body. It is useful for looking at many parts of the body and often gives extra information to plain X-rays, ultrasounds or CT scans.

CAT scans is a procedure that uses a computer linked to an x-ray machine to make a series of detailed pictures of areas inside the body.