Question

Some of the text aids in the passage are in colored text. Which sentence or phrase below is also a text aid in the passage?

Answer 1

The Stereoscope


Have you ever been to an antique shop and
seen a device that looked like binoculars, but
with a wire stand mounted in front of the lenses?
What you saw was probably a stereoscope.
Most homes in the late nineteenth and early
twentieth century had one.

The Stereoscope: Antique "Toy"
The stereoscope is a device for viewing
images - usually photographs. These images
are really two similar pictures of the same
subject, placed side by side and printed on one
rectangular card. The cards are called
stereographs. The images printed on
stereographs are 2.5 inches apart - about the
distance between the eyes. When viewers look
through the lenses of the stereoscope, the two
images appear to merge. What viewers see
looks like one three-dimensional (3D) image.

History
The stereoscope was invented in 1833;
however, it did not become popular until after the
invention of photography. The first stereoscopes
used drawings instead of photographs. But in
1849, Sir David Brewster improved the device,
making it easier to use. He also invented a
camera that took double pictures. People began
using photographs instead of drawings. Oliver
Wendell Holmes improved the design even
further, and a new industry was born.
Stereographic images were one way that
people recorded and viewed historical events
before newspapers included photographs.
Stereographic images appeared to leap out at
the viewer, lending drama to the events.
Stereographs showed a wide range of
subjects. Among the most popular were
photographs of national parks and the great
Chicago fire. You can often find stereographs in
antique shops.

Answer 2

A. The stereoscope was invented in 1833; however, it did not become popular until after the invention of photography.
B. The Stereoscope
C. Stereographic images appeared to leap out at the viewer, lending drama to the events.

Answer 3

What do you think?