Photo: Optical microscope in a medical setting
Optical instruments extend our visual range. Details of cellular
structure-not to mention organisms like bacteria-are too small
for our eye to see them. Microscopes, like the one shown here,
give us access to a whole new world and all the knowledge and
information it contains. Try to imagine today's medical advances
without the use of microscopes. Impossible!
Alternate Photo: Modern astronomical telescopes.
Optical Instruments extend our visual range. Astronomical telescopes,
like the one pictured here, extend our vision to the farthest
edges of the Universe. Other telescopes can help in surveying-or
in seeing the performers of an opera more closely.
|Chapter 19 Optical Instruments|
|19.1 Simple Camera|
|19.2 The Human Eye|
|19.3 Lenses in Combinations|
|19.4 Simple Magnifier|
|19.7 End of chapter Materials|