Chapter 2 Study Guide: Using Light

Question 0

Is defined as the ability to do work

Answer 0

Energy

Question 1

A disturbance that transfers energy from place to place

Answer 1

Wave

Question 2

The material through which a wave travels

Answer 2

Medium

Question 3

A repeated back-and-forth or up-and-down motion

Answer 3

Vibration

Question 4

The high point of a wave

Answer 4

Crest

Question 5

The low point of a wave

Answer 5

Trough

Question 6

The maximum distance that the particles of the medium carrying the wave move away from their rest postitions

Answer 6

Amplitude

Question 7

The distance between two corresponding parts of a wave

Answer 7

Wavelength

Question 8

The number of complete waves that pass a given point in a certain amount of time

Answer 8

Frequency

Question 9

Is frequency measured in units

Answer 9

Hertz

Question 10

Transfers electrical and magnetic energy

Answer 10

Electromagnetic Wave

Question 11

The energy that is transferred through space by electromagnetic waves

Answer 11

Electromagnetic Radiation

Question 12

The complete range of electromagnetic waves placed in order of increasing frequency

Answer 12

Electromagnetic Spectrum

Question 13

Electromagnetic waves that you can see

Answer 13

Visible Light

Question 14

Transmits most of the light that strikes it

Answer 14

Transparent

Question 15

Scatters light as it passes through

Answer 15

Translucent

Question 16

Reflects or absorbs all of the light that strikes it

Answer 16

Opaque

Question 17

Three colors that combine to make any other color

Answer 17

Primary Colors

Question 18

Two primary colors that combine in equal amounts

Answer 18

Secondary Color

Question 19

Any two colors that combine to form white light

Answer 19

Complementary Colors

Question 20

Colored substances that are used to color other materials

Answer 20

Pigments

Question 21

An object or wave bounces back off a surface through which it cannot pass

Answer 21

Reflection

Question 22

The angle of incidence equals the angle of reflection

Answer 22

Law of Reflection

Question 23

A flat sheet of glass that has a smooth, silver-colored coating on one side

Answer 23

Plane Mirror

Question 24

A copy of an object formed by reflected or refracted rays of light

Answer 24

Image

Question 25

The image you see in a plane mirror

Answer 25

Virtual Image

Question 26

A mirror with a surface that curves inward like the inside of a bowl

Answer 26

Concave Mirror

Question 27

An imaginary line that divides a mirror in half

Answer 27

Optical Axis

Question 28

The point at which rays parallel to the optical axis meet or converge

Answer 28

Focal Point

Question 29

Forms when rays meet

Answer 29

Real Image

Question 30

A mirror with a surface that curves outward

Answer 30

Convex Mirror

Question 31

Bending of light waves that are due to a change in speed

Answer 31

Refraction

Question 32

A curved piece of glass or other transparent material that refracts light

Answer 32

Lens

Question 33

Thicker in the center than at the edges (also known as a magnifying glass)

Answer 33

Convex Lens

Question 34

Thinner in the center than at the edges

Answer 34

Concave Lens

Question 35

Where light enters the eye through the transparent front surface

Answer 35

Cornea

Question 36

An opening through which light enters the inside of the eye

Answer 36

Pupil

Question 37

A ring of muscle that contracts and expands to change the size of the pupil

Answer 37

Iris

Question 38

A layer of cells that lines the inside of the eyeball

Answer 38

Retina

Question 39

Contains a pigment that responds to small amounts of light

Answer 39

Rods

Question 40

Respond to color

Answer 40

Cones

Question 41

Can see nearby things clearly, but objects at a distance are blurred

Answer 41

Nearsighted

Question 42

Can see distant objects clearly, but nearby objects appear blurry

Answer 42

Farsighted

Question 43

Uses one or more lenses to focus light, and film to record an image

Answer 43

Camera

Question 44

Forms enlarged images of distant objects

Answer 44

Telescope

Question 45

Consists of two convex lenses, one at each end of a tube

Answer 45

Refracting Telescope

Question 46

Gathers the light coming from an object and focuses the rays to form a real image

Answer 46

Objective

Question 47

Magnifies the image so you can see it clearly

Answer 47

Eyepiece

Question 48

Uses a large, concave mirror to gather light

Answer 48

Reflecting Telescope

Question 49

An optical tool that makes small objects look larger

Answer 49

Microscope

Question 50

Use a beam of tiny particles called electrons instead of light to produce a magnified image

Answer 50

Electron Microscope

Question 51

Sends signals from the retina to the brain

Answer 51

Optic Nerve