Light and Opitcs

Question 1

do

Answer 1

Distance from mirror to object

Question 2

di

Answer 2

Distance from mirror to image

Question 3

f

Answer 3

focal length

Question 4

ho

Answer 4

object height

Question 5

hi

Answer 5

image height

Question 6

Is focal length negative or positive for concave mirrors?

Answer 6

positive

Question 7

Negative or positive focal lenth for convex mirrors?

Answer 7

Negative

Question 8

-magnification inverted or upright?

Answer 8

Inverted

Question 9

+magnification inverted or upright?

Answer 9

Upright

Question 10

+di real or virtual image?

Answer 10

Real

Question 11

-di real or virtual image?

Answer 11

virtual (behind mirror)

Question 12

+do real or virtual image?

Answer 12

Real

Question 13

-do real or virtual image?

Answer 13

Virtual (behind mirror)

Question 14

3 principal rays for Concave Mirror

Answer 14

1. In parallel, out F
2. In F, out parallel
3. In C, out back it’s incoming path

Question 15

3 Principal rays for Convex Mirror

Answer 15

1. In parallel, out as though it came from F
2. In as though it is going to F, out parallel
3. In as going to C, back along incoming path

Question 16

Refraction: Light enters medium where speed _____, bent toward normal.

Answer 16

Decreases

Question 17

Refraction: Light enters medium where speed increases, bent _____ normal.

Answer 17

Away

Question 18

Are direction of propagation and index of refraction directly or inversely relate?

Answer 18

Directly

Question 19

Principal rays for Converging Lens

Answer 19

1. In parallel, out F
2. In F, out parallel
3. Through midpoint

Question 20

Principal rays for Diverging Lens

Answer 20

1. In parallel, out as though came from near side F
2. In as though going to far side F, out parallel
3. In through midpoint

Question 21

The angle of incidence of light striking a surface is measure with respect to

Answer 21

The normal to the surface

Question 22

The image formed by a plane mirror is

Answer 22

Upright and virtual

Question 23

3 things that describe a virtual image?

Answer 23

Light does not pass through it.
Cannot be focused on screen.
Must trace diverging rays backwards on ray diagram.

Question 24

If the magnification of an image is negative, then

Answer 24

The image is inverted

Question 25

Image from concave mirror. Magnification of -2. Image is?

Answer 25

Inverted and smaller

Question 26

If magnification is positive, then

Answer 26

Image is upright

Question 27

If di is negative, which must also be true of image?

Answer 27

Image is virtual

Question 28

A concave mirror has a negative or positive focal length?

Answer 28

Positive

Question 29

When light travels from air to glass...

Answer 29

Slows down

Question 30

Index of refraction, n, is always a number...

Answer 30

Greater than or equal to 1

Question 31

Light goes from air to glass with n greater than 0. What happens when light enters glass.

Answer 31

Bends toward the normal

Question 32

Light in air enters water. What happens to wavelength and frequency?

Answer 32

Wavelength decreases, frequency stays the same

Question 33

What kind of images can converging lenses produce?

Answer 33

Real and virtual

Question 34

What kind of images can diverging lenses produce?

Answer 34

Only virtual

Question 35

Young's double slit experiment demonstartes that light...

Answer 35

Has a wave nature

Question 36

Light actually passes through imagine. Real or Virtual? (Plane mirror)

Answer 36

Real

Question 37

Formed by converging rays. Real or virtual? (Plane Mirror)

Answer 37

Real

Question 38

Can be projected on a screen. Real or Virtual? (Plane Mirror)

Answer 38

Real

Question 39

Light does not actually pass through the image. Real or Virtual? (Plane Mirror)

Answer 39

Virtual

Question 40

Formed by "tracing" diverging rays backwards. Real or Virtual? (Plane Mirror)

Answer 40

Virtual

Question 41

Can't be projected on a screen. Real or Virtual? (Plane Mirror).

Answer 41

Virtual

Question 42

Center of curvature. Mirrors or Lenses?

Answer 42

Mirrors

Question 43

2 Focal Points. Mirrors or Lenses?

Answer 43

Lenses

Question 44

The mirrors in stores are concave or convex?

Answer 44

Convex

Question 45

Is F positive or negative for concave?

Answer 45

Positive

Question 46

Is F positive or negative for convex mirros?

Answer 46

Negative