1139 Definitions

Question 1

reflection of light rays in all directions

Answer 1

diffuse reflection

Question 2

treats light as rays traveling in straight lines

Answer 2

geometric optics

Question 3

best reflector of light

Answer 3

silver

Question 4

percentage of light reflected by a surface

Answer 4

albedo

Question 5

transmits all light

Answer 5

transparent surface

Question 6

science of light and vision

Answer 6

optics

Question 7

absorbs all light

Answer 7

black surface

Question 8

extended motion of light rays in a straight line

Answer 8

rectilinear propagation

Question 9

form of radiant energy created by God

Answer 9

light

Question 10

the angle of incidence = the angle of reflection

Answer 10

the law of reflection

Question 11

the separation of light into its component colors

Answer 11

dispersion

Question 12

angle at which light is refracted at an angle of 90 degrees

Answer 12

critical angle

Question 13

compound lens

Answer 13

a lens made up of several individual lens elements

Question 14

ray diagram

Answer 14

a scale drawing showing the path of light through a lens or from a mirror

Question 15

reverses image left to right; forms virtual images

Answer 15

plane mirror

Question 16

converges parallel light rays; forms real images

Answer 16

convex lens and concave mirror

Question 17

diverges parallel light rays; forms virtual images

Answer 17

concave lens and convex mirror

Question 18

image/real

Answer 18

.

Question 19

1/focal length = 1/distance from object + 1/distance from image

Answer 19

.

Question 20

remember to study convex lens with object beyond near focus

Answer 20

.

Question 21

replaced the pinhole with a convex lens, letting in more light and producing a brighter image

Answer 21

Alhazen

Question 22

regulates the amount of light reaching the film

Answer 22

diaphragm

Question 23

controls how long light strikes the photographic emulsion

Answer 23

shutter

Question 24

first used a compound microscope in studying science

Answer 24

Robert Hooke

Question 25

eliminated chromatic aberration by constructing a refracting telescope with a focal length of 6 meters

Answer 25

Christian Huygens

Question 26

eliminated chromatic aberration in lenses by combining two lenses of differing properties

Answer 26

John Dollond

Question 27

designed the first reflecting telescope

Answer 27

Isaac Newton

Question 28

the kind of mirror used to correct spherical aberration

Answer 28

parabolic

Question 29

invented the first telescope

Answer 29

Hans Lippershey

Question 30

the ability of a telescope to render visible two objects that are close together

Answer 30

resolution

Question 31

improved Galilei’s telescope by using a convex eye lens

Answer 31

Johannes Kepler

Question 32

focal length/aperture

Answer 32

.

Question 33

lower f number =

Answer 33

brighter

Question 34

reflects all light

Answer 34

reflective surface