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Physics 231 > Light and Opitcs > Flashcards

Light and Opitcs Flashcards

1
Q

do

A

Distance from mirror to object

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2
Q

di

A

Distance from mirror to image

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3
Q

f

A

focal length

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4
Q

ho

A

object height

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5
Q

hi

A

image height

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6
Q

Is focal length negative or positive for concave mirrors?

A

positive

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7
Q

Negative or positive focal lenth for convex mirrors?

A

Negative

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8
Q

-magnification inverted or upright?

A

Inverted

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9
Q

+magnification inverted or upright?

A

Upright

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10
Q

+di real or virtual image?

A

Real

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11
Q

-di real or virtual image?

A

virtual (behind mirror)

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12
Q

+do real or virtual image?

A

Real

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13
Q

-do real or virtual image?

A

Virtual (behind mirror)

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14
Q

3 principal rays for Concave Mirror

A
  1. In parallel, out F
  2. In F, out parallel
  3. In C, out back it’s incoming path
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15
Q

3 Principal rays for Convex Mirror

A
  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
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16
Q

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

A

Decreases

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17
Q

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

A

Away

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18
Q

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

A

Directly

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19
Q

Principal rays for Converging Lens

A
  1. In parallel, out F
  2. In F, out parallel
  3. Through midpoint
20
Q

Principal rays for Diverging Lens

A
  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
21
Q

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

A

The normal to the surface

22
Q

The image formed by a plane mirror is

A

Upright and virtual

23
Q

3 things that describe a virtual image?

A

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

24
Q

If the magnification of an image is negative, then

A

The image is inverted

25
Q

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

A

Inverted and smaller

26
Q

If magnification is positive, then

A

Image is upright

27
Q

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

A

Image is virtual

28
Q

A concave mirror has a negative or positive focal length?

29
Q

When light travels from air to glass…

A

Slows down

30
Q

Index of refraction, n, is always a number…

A

Greater than or equal to 1

31
Q

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

A

Bends toward the normal

32
Q

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

A

Wavelength decreases, frequency stays the same

33
Q

What kind of images can converging lenses produce?

A

Real and virtual

34
Q

What kind of images can diverging lenses produce?

A

Only virtual

35
Q

Young’s double slit experiment demonstartes that light…

A

Has a wave nature

36
Q

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

37
Q

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

38
Q

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

39
Q

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

40
Q

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

41
Q

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

42
Q

Center of curvature. Mirrors or Lenses?

43
Q

2 Focal Points. Mirrors or Lenses?

44
Q

The mirrors in stores are concave or convex?

45
Q

Is F positive or negative for concave?

46
Q

Is F positive or negative for convex mirros?

Physics 231 (5 decks)

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