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Abigail B. Roberts - Using Lenses

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Abigail B. Roberts Using Lenses
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    Using Lenses
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Observing objects closely is an important part of being a scientist. Thats why lenses are so important in the laboratory and in the science classroom. Young scientists may be surprised to learn that theyve probably already used lenses-in the form of a magnifying glass. This tool and others, such as microscopes, help scientists see details of objects up close. This invaluable book introduces lenses and the concept of optics in an easy to understand way and encourages readers to experiment with lenses themselves!

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Table of Contents
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USING LENSES Abigail B Roberts SUPER SCIENCE TOOLS leveled reader - photo 1
USING LENSES
Abigail B. Roberts
SUPER SCIENCE TOOLS
leveled reader
science
.
SUPER SCIENCE TOOLS USING LENSES By Abigail B Roberts - photo 2
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SUPER SCIENCE TOOLS USING LENSES By Abigail B Roberts Please - photo 3
SUPER SCIENCE TOOLS
USING
LENSES
By Abigail B. Roberts
.
Please visit our website www garethstevens com For a free color catalog of - photo 4
Please visit our website, www. garethstevens. com. For a free color catalog of all our high-quality books, call toll free 1-800-542-2595 or fax 1-877-542-2596.
Cataloging-in-Publication Data
Names: Roberts, Abigail B. Title: Using lenses / Abigail B. Roberts. Description: New York : Gareth Stevens Publishing, 2018. | Series: Super science tools | Includes index. Identifiers: ISBN 9781482463897 ( pbk. ) | ISBN 9781482463910 ( library bound) | ISBN 9781482463903 ( pack) Subjects: LCSH: Lenses--Juvenile literature. | Light--Juvenile literature. Classification: LCC QC385. R478 2018 | DDC 535--dc23
Published in 2018 by Gareth Stevens Publishing East 14th Street, Suite New York, NY 10003
Copyright 2018 Gareth Stevens Publishing
Designer: Laura Bowen Editor: Therese Shea
Photo credits: Cover, p. Bosnian/Shutterstock. com; pp. 1--24 ( series art) T. Sumaetho/ Shutterstock. com; p. JensHN/Shutterstock. com; p. Fizped/Wikimedia Commons; p. Visuals Unlimited, Inc. /GIPhotoStock/Getty Images; p. ( top) Phovoir/Shutterstock. com; p. ( bottom) Violart/Shutterstock. com; p. ( main) GIPhotoStock/Science Source/ Getty Images; p. ( inset) JEROME WEXLER/Science Source/Getty Images; p. ( top) Pavel L Photo and Video/Shutterstock. com; p. ( bottom) Siobodan Zivkovic/ Shutterstock. com; p. ( main) IvanRiver/Shutterstock. com; p. ( inset) toeytoey/ Shutterstock. com; p. ( main) Radharani/Shutterstock. com; p. ( inset) Babak Tafreshi/ National Geographic/Getty Images; p. ( top) Blend Images/Shutterstock. com; p. ( bottom) suriya yapin/Shutterstock. com.
All rights reserved. No part of this book may be reproduced in any form without permission in writing from the publisher, except by a reviewer.
Printed in the United States of America
CPSIA compliance information: Batch #CS17GS: For further information contact Gareth Stevens, New York, New York at 1-800-542-2595.
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Contents Looking at Lenses A Bit About Light Convex Lenses Concave - photo 5
Contents
Looking at Lenses
A Bit About Light
Convex Lenses
Concave Lenses
Lenses in Science
In Your Eyes
Glossary
For More Information
Index
Boldface words appear in the glossary
.
Looking at Lenses A lens is a curved piece of see-through material such - photo 6
Looking at Lenses
A lens is a curved piece of
see-through material , such as
glass. Its shape can make objects
look clearer, smaller, or bigger.
Lenses are tools that make our
lives better! Lenses work by
bending light in useful ways.
.
A Bit About Light Think of light as traveling in rays Light rays - photo 7
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A Bit About Light Think of light as traveling in rays Light rays move in a - photo 8
A Bit About Light
Think of light as traveling in rays.
Light rays move in a straight line.
However, they bend when they
pass from one material to another,
such as from air to glass. This is
called refraction.
.
light source reflected light glass refracted light Convex - photo 9
light source
reflected light
glass
refracted light
.
Convex Lenses People make special lenses to bend light A convex lens - photo 10
Convex Lenses
People make special lenses to bend
light. A convex lens curves outward.
Its thickest in the middle. When light
rays pass through a convex lens,
they bend toward each other. They
come together at a point called
the focus .
.
convex lens focus A magnifying glass is a useful convex lens - photo 11
convex lens
focus
.
A magnifying glass is a useful convex lens It makes objects such as small - photo 12
A magnifying glass is a useful
convex lens. It makes objects such
as small bugs look much larger.
You can see details that are hard
to see with just your eyes. Scientists
sometimes call magnifying glasses
hand lenses.
.
Concave Lenses A concave lens curves inward Its thicker at its edges - photo 13
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Concave Lenses A concave lens curves inward Its thicker at its edges than - photo 14
Concave Lenses
A concave lens curves inward.
Its thicker at its edges than at its
middle. When light passes through
a concave lens, the rays spread
apart. When you look through a
concave lens, objects look farther
away than they are.
.
concave lens view of ruler through concave lens Some old movie - photo 15
concave lens
view of ruler through concave lens
.
Some old movie theaters use projectors with concave lenses A light in the - photo 16
Some old movie theaters use
projectors with concave lenses.
A light in the projector shines
through a picture. A concave lens
makes the light rays spread out
and form a larger picture on
a screen. Some flashlights use
concave lenses, too.
.
Lenses in Science Microscopes are science tools that make small - photo 17
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Lenses in Science Microscopes are science tools that make small objects - photo 18
Lenses in Science
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