Viewing Cells A. Magnifying cells A. Early microscopes – lenses made images larger but not always...

Viewing Cells Viewing Cells A. A. Magnifying cells Magnifying cells A. A. Early microscopes Early microscopes – lenses made – lenses made images larger but images larger but not always clear. not always clear. B. B. Modern microscopes Modern microscopes that use lenses to that use lenses to bend light. bend light. C. C. A simple A simple microscope has one microscope has one lens while a lens while a compound compound microscope has two microscope has two sets of lenses. sets of lenses.

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Transcript of Viewing Cells A. Magnifying cells A. Early microscopes – lenses made images larger but not always...

Page 1: Viewing Cells A. Magnifying cells A. Early microscopes – lenses made images larger but not always clear. B. Modern microscopes that use lenses to bend.

Viewing CellsViewing Cells

A.A. Magnifying cellsMagnifying cellsA.A. Early microscopes – Early microscopes –

lenses made images lenses made images larger but not larger but not always clear.always clear.

B.B. Modern Modern microscopes that microscopes that use lenses to bend use lenses to bend light.light.

C.C. A simple microscope A simple microscope has one lens while a has one lens while a compound compound microscope has two microscope has two sets of lenses.sets of lenses.

Page 2: Viewing Cells A. Magnifying cells A. Early microscopes – lenses made images larger but not always clear. B. Modern microscopes that use lenses to bend.

A stereomicroscope, A stereomicroscope, which has two which has two eyepieces, creates a eyepieces, creates a 3-D image.3-D image.

Powers of the Powers of the eyepiece multiplied by eyepiece multiplied by objective lenses objective lenses determine total determine total magnification. magnification.

Electron microscopes Electron microscopes – more powerful than – more powerful than other microscopes.other microscopes.

Use a magnetic field Use a magnetic field in a vacuum to bend in a vacuum to bend electronic beamselectronic beams

Images must be Images must be photographed or photographed or produced produced electronically. electronically.

Page 3: Viewing Cells A. Magnifying cells A. Early microscopes – lenses made images larger but not always clear. B. Modern microscopes that use lenses to bend.

Development of the cell theory Development of the cell theory The The cell theorycell theory resulted from many resulted from many

scientists’ observations and scientists’ observations and conclusions.conclusions.

The The basic unitbasic unit of organization is the of organization is the cell.cell.

All organisms are composed of one All organisms are composed of one or more cells.or more cells.

New cells come from old cells New cells come from old cells through through cell division. cell division.

Cells Chapter 3. Outline History Modern Microscopes Eukaryotic and Prokaryotic Cells Cell Structure Cell Components Cell Reproduction Interphase

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Chapter 23Chapter 23 Mirrors and Lenses. Mirrors and Lenses •The development of mirrors and lenses aided the progress of science. •It led to the microscopes and telescopes. –Allowed

BIOLOGY 1101 LAB 2: MICROSCOPES AND CELLS …storage.googleapis.com/biology1101/Lab_2.pdfLAB 2: MICROSCOPES AND CELLS READING: ... used to study cells and cell structures. LABORATORY

Scanning Electron Microscope Jamie Goings. Theory Conventional microscopes use light and glass lenses SEM uses electrons and magnetic lenses to create.

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$Types of Microscopes Light Microscope the models found in most schools, use compound lenses and light to magnify objects. The lenses bend or refract.$