Chapter 26

Question 1

image formation is possible via:

• ________
• spherical mirrors
• ________
• thin lenses

Answer 1

flat mirrors

refraction

Question 2

the object distance p is the distance from the ________

Answer 2

object to the mirror/lens

Question 3

the image distance q is the distance from the ________

Answer 3

image to the mirror/lens

Question 4

a ________ is formed when light rays do not pass through the image point but only appear to diverge from that point

Answer 4

virtual image

Question 5

________ cannot be displayed on screens

Answer 5

virtual images

Question 6

the image of an object seen in a flat mirror is ALWAYS ________

Answer 6

virtual

Question 7

a ________ is used to study mirrors and lenses

Answer 7

ray diagram

Question 8

a ray diagram allows us to build a ________ so that geometry and trig can be used to solve a problem mathematically

Answer 8

geometric model

Question 9

the image formed by an object placed in front of a FLAT mirro is ________ the mirror as the object is ________ of the mirror

Answer 9

as far behind

in front

Question 10

magnification does not always mean bigger, the size can either ________, M can be less than or greater than 1

Answer 10

increase or decrease

Question 11

magnification is valid for images formed by ________

Answer 11

lenses

Question 12

lateral magnification of a FLAT mirror is ________, meaning ________ for all images

Answer 12

1

h’ = h (image height = object height)

Question 13

a FLAT mirror produces an image that has an APPARENT left-right reversal, but the reversal is ACTUALLY a ________ reversal

Answer 13

front-back

caused by light rays going forward toward the mirror and then reflecting back from it

Question 14

a ________ has the light reflected from the inner, or concave, side of the curve

Answer 14

concave mirror

Question 15

a line drawn from the center of curvature to the center of the spherical segment is called the ________ of the mirror

Answer 15

principal axis

Question 16

________ always reflect through the image point, assume that all rays diverging from an object make small angles with the principal axis

Answer 16

paraxial rays

Question 17

the mirror equation can be used for ________ mirrors

Answer 17

spherical

Question 18

if the object is very far from a spherical mirror, q = ________… all the incident rays are almost ________

Answer 18

R/2

parallel

Question 19

the point at which the incoming parallel rays intersect after reflecting from a spherical mirror is called the ________

Answer 19

focal point F

Question 20

the focal point is a distance f from the mirror, called the ________

Answer 20

focal length

Question 21

a convex mirror is sometimes called a ________ mirror

Answer 21

diverging

Question 22

the image from a convex mirror is ________ because the reflected rays only appear to originate at the ________

Answer 22

virtual

image point

Question 23

in general, the image formed by a convex mirror is ________, ________ and ________ than the object

Answer 23

upright
virtual
smaller

Question 24

front or real size:

p and q are ________

Answer 24

positive

Question 25

back or virtual side: | p and q are ________

Answer 25

negative

Question 26

a ________ can be used to determine the position and size of an image

Answer 26

ray diagram

Question 27

to draw a ray diagram you must know the ________ and the locations of the ________ and the ________

Answer 27

position of the object focal point center of curvature

Question 28

if the center of curvature is between the object and the concave mirror surface: - the image is ________ - the image is ________ - the image is ________ than the object (reduced)

Answer 28

real inverted smaller

Question 29

if the object is between the mirror surface and the focal point: - the image is ________ - the image is ________ - the image is ________ than the object (enlarged)

Answer 29

virtual upright larger

Question 30

if the object is in front of a convex mirror: - the image is ________ - the image is ________ - the image is ________ than the object (reduced)

Answer 30

virtual upright smaller

Question 31

when the object is outside the focal point of a CONCAVE mirror, the image is ________

Answer 31

real

Question 32

when the object is at the focal point of a CONCAVE mirror, the image is ________

Answer 32

infinitely far away

Question 33

when the object is between the CONCAVE mirro and the focal point, the image is ________

Answer 33

virtual

Question 34

with a convex mirror, the image is always ________ and ________

Answer 34

virtual | upright

Question 35

as the object distance decreases with a convex mirror, the virtual image ________

Answer 35

increases in size

Question 36

with a CONCAVE mirror, the image may be either ________ or ________

Answer 36

real | virtual

Question 37

in REFRACTION, real images are formed on the side of the surface that is ________ the side from which the light comes this is CONTRAST to mirror, for which real images are formed on the side where the light originates

Answer 37

opposite

Question 38

a typical thin lens consists of a piece of ________ or ________, the two surfaces are either segments of ________ or ________

Answer 38

glass plastic spheres planes

Question 39

any convex lenses is called a ________

Answer 39

converging lense

Question 40

any concave lens is called a ________

Answer 40

diverging lense

Question 41

in THIN LENSES, parallel rays pay through a ________ and converge at the ________

Answer 41

converging lens | focal point

Question 42

the ________ in THIN LENSES is the distance from the focal point to the lens

Answer 42

focal length

Question 43

for a ________ (thin lens), parallel rays diverge after passing through the lens - the focal point is the point where the rays appear to have originated

Answer 43

diverging lens

Question 44

thin lens approximation: assumes the thickness of the lens to be ________ -so the focal point can be measured to the ________ or the ________ of the lenses

Answer 44

negligible center surface

Question 45

lenses will have ________ focal length and ________ focal points

Answer 45

1 | 2

Question 46

the focal length for a lens in air is related to the ________ and to the ________

Answer 46

curvatures of its surfaces | index of refraction n of the lens material

Question 47

consider a converging lens where the object is outside the focal point - the image is _______ - the image is _______ - the image is on the _______ of the lens

Answer 47

real inverted back side

Question 48

for a converging lens, where the object is between the focal point and lens - the image is _______ - the image is _______ - the image is _______ than the object - the image is on the _______ of the lens

Answer 48

virtual upright larger front side

Question 49

for a diverging lens, no matter where the object is in front of the lens - the image is _______ - the image is _______ - the image is _______ - the image is on the _______ of the lens

Answer 49

virtual upright smaller front side

Question 50

for a converging lens, when the object distance is greater than the focal length (p>f) -the image is _______ and _______

Answer 50

real | inverted

Question 51

for a converging lens, when the object is between the focal point and the lens, (p

Answer 51

virtual | upright

Question 52

for a diverging lens, the image is always _______ and _______ -irregardless of where the object is placed

Answer 52

virtual | upright

Question 53

for two lenses the image of the first lens is treated as the _______ of the second lens the image formed by the second lens is the _______ of the system the overall magnification is the _______ of the magnification of the separate lenses

Answer 53

object final image product