Chapter 12 - Light

Question 1

Materials that absorb and reflect light

Answer 1

Opaque

Question 2

Materials that transmit light but also scatter it

Answer 2

Translucent

Question 3

Materials that transmit light without scattering it

Answer 3

Transparent

Question 4

Property of a material that indicates how much the speed of light in the material is reduced compared to a vacuum

Answer 4

Index of Refraction

Question 5

An image of a distant object produced by the refraction of light through air layers of different densities

Answer 5

Mirage

Question 6

Objects can ____, _____, and _____ light.

Answer 6

Absorb, Reflect, Transmit

Question 7

Light waves always follow the Law of __________.

Answer 7

Reflection

Question 8

Reflection can be ______ or _______.

Answer 8

Regular, Diffuse

Question 9

Refraction occurs when light changes _______ in moving from one ______ to another at an angle.

Answer 9

Speed, Material

Question 10

Different wavelengths of light are refracted by ________ amounts.

Answer 10

Different

Question 11

Transparent material that selectively transmits light

Answer 11

Filter

Question 12

Colored material that is used to change the color of other substances.

Answer 12

Pigment

Question 13

The color of an object depends on the wavelengths of ______ they reflect.

Answer 13

Light

Question 14

_____ and _____ cells are light-sensitive cells found in the human eye

Answer 14

Rod, Cone

Question 15

(+ or o) The color of a filter is the color of the light that the filter transmits.

Answer 15

+

Question 16

All light colors can be created by mixing the primary colors: _____, ____, and ______.

Answer 16

Magenta, Cyan, and Yellow

Question 17

What are the primary light colors?

Answer 17

Red, Blue, Green

Question 18

What are the primary pigment colors?

Answer 18

Magenta, Cyan, Yellow

Question 19

Generated by heating a piece of metal until it glows

Answer 19

Incandescent Light

Question 20

Generated by using phosphors to convert UV radiation to visible light

Answer 20

Fluorescent Light

Question 21

One wavelength, one direction, constant distance

Answer 21

Coherent Light

Question 22

more than one wavelength, can travel more than one direction, no consistancy

Answer 22

Incoherent Light

Question 23

______ and ______ lightbulbs are often used in homes, schools, and offices.

Answer 23

Incandescent and Fluorescent

Question 24

When electrons collide with neon gas, ____ ____ is emitted

Answer 24

Red Light

Question 25

A ________ bulb is brighter and hotter than an ordinary lightbulb

Answer 25

Tungsten-Halogen

Question 26

Lasers emit _____ beams of coherent light.

Answer 26

Narrow

Question 27

Light with a magnetic field that vibrates in only one direction

Answer 27

Linearly Polarized Light

Question 28

Technique that produces a hologram

Answer 28

Holography

Question 29

For this to occur, light must travel slower in the 1st medium and must strike the boundary at an angle greater than the critical angle

Answer 29

Total Internal Reflection

Question 30

Device that reads instensities of reflected light and converts the info to digital signals

Answer 30

Optical Scanner