Science W4 - Mirrors and Lenses

Question 1

an electromagnetic radiation that has properties of waves and particles

Answer 1

light

Question 2

the bouncing back of light into the same medium it has been traveling after striking a surface

Answer 2

reflection

Question 3

two types of reflection

Answer 3

regular/specular and diffuse

Question 4

type of reflection that occurs when the reflective surface is very smooth

Answer 4

regular/specular reflection

Question 5

type of reflection that occurs when the reflective surface is rough

Answer 5

diffuse reflection

Question 6

transfer of energy carried by light waves to the particles of matter

Answer 6

absorption

Question 7

the reflection of light by particles

Answer 7

scattering

Question 8

Law of Reflection

Answer 8

The angle of incidence is equal to the angle of reflection. The incident ray, the normal to the mirror at the point of incidence, and the reflected ray all lie in the same plane.

Question 9

any surface that is smooth to produce regular reflection of light incident upon it

Answer 9

mirror

Question 10

two types of mirror

Answer 10

plane and spherical

Question 11

a flat, two-dimensional surface that reflects light using the law of reflection; simplest and the most common optical instrument

Answer 11

plane mirror

Question 12

in which the object is laterally inverted (L-R)

Answer 12

reversal effect

Question 13

image formed by plain mirrors

Answer 13

virtual
upright
same size as the object
located the same distance behind the mirror
laterally reversed

Question 14

a curved mirror that produces images differing in shape, size, and orientation relative to the object

Answer 14

spherical mirror

Question 15

two types of spherical mirrors

Answer 15

concave and convex

Question 16

a mirror that curves inward like the hollow inside of a sphere

Answer 16

concave mirror

Question 17

converging mirror

Answer 17

concave mirror

Question 18

a mirror with a reflecting surface on the outer side of a sphere

Answer 18

convex mirror

Question 19

diverging mirror

Answer 19

convex mirror

Question 20

the bending of light as it passes from one medium to another with a different optical density

Answer 20

refraction

Question 21

the separation of light into colors by a prism

Answer 21

dispersion

Question 22

Law of Refraction

Answer 22

1. The incident ray, the refracted ray, and the normal to the interface of two transparent media at the point of incidence all lie in the same plane.
2. When a ray of light passes obliquely from an optically denser medium to a less dense medium it is refracted away from the normal.
   When a ray of light passes obliquely from an optically less dense medium to a denser medium, it is refracted toward the normal.
   When the incident ray is perpendicular to the interface, no bending of the light occurs.

Question 23

a transparent object with two nonparallel curved surfaces or one plane and one curved surface that refracts light to form an image

Answer 23

lens

Question 24

a lens thicker in the middle than at the edges

Answer 24

convex lens

Question 25

converging lens

Answer 25

convex lens

Question 26

a lens thinner in the middle and thicker at the edges

Answer 26

concave lens

Question 27

diverging lens

Answer 27

concave lens

Question 28

the point where refracted rays converge or appear to diverge

Answer 28

principal focus (F)

Question 29

behind the lenses

Answer 29

secondary focus (F’)

Question 30

the point through which all light rays pass without bending

Answer 30

optical center (P)

Question 31

the distance from optical center to the principal focus

Answer 31

focal length (f)

Question 32

the line joining the optical center and the principal focus

Answer 32

principal axis

Question 33

formed when light rays converge and can be projected on a screen

Answer 33

real image

Question 34

formed when light rays only appear to converge and cannot be projected on a screen

Answer 34

virtual image