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Physics 1 > Optics, Waves, Lasers 1 > Flashcards

Optics, Waves, Lasers 1 Flashcards

1
Q

real image

A

converge at P’

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2
Q

virtual image

A

diverge at P’

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3
Q

image either

A

erect or inverted

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4
Q

if lateral magnification positive

A

erect

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5
Q

if lateral magnification negative

A

inverted

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6
Q

lateral magnification=

A

hi/ho

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7
Q

focal point

A

point where parallel rays converge after reflection from concave or diverge after reflection from convex

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8
Q

focal length

A

focal point to vertex

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9
Q

object/image distances - plane mirror

A

1/s+1/s’=0

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10
Q

object/image distances - spherical mirror

A

1/s+1/s’=2/R=1/f

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11
Q

object/image distances - plane refracting surface

A

na/s+nb/s’=0

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12
Q

object/image distances - spherical refracting surface

A

na/s+nb/s’=nb-na/R

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13
Q

lateral magnification - plane mirror

A

m=-s’/s=1

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14
Q

lateral magnification - spherical mirror

A

m=-s’/s

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15
Q

lateral magnification - plane refracting surface

A

m=-nas’/nbs=1

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16
Q

lateral magnification - spherical refracting surface

A

m=-nas’/nbs

17
Q

non paraxial rays

A

do not converge precisely - spherical abberation

18
Q

thin lenses - 1/s+1/s’=

A

1/f

19
Q

thin lenses 1/f=

A

(n-1)(1/R1-1/R2)

20
Q

s>0 when

A

object on incoming side (real object)

21
Q

s’>0 when

A

image is on outgoing side (real image)

22
Q

R>0 when

A

centre of curvature is on outgoing side

23
Q

m>0 when

A

image is erect

24
Q

what do cameras form?

A

real, inverted image

25
Q

camera - what controls the amount of light

A

shutter speed an aperture

26
Q

camera - intensity is inversely proportional to

A

square of f-number

27
Q

f number

A

f/D

28
Q

refraction at surface of cornea forms

A

real image on retina

29
Q

what adjusts for object distances

A

squeezing lens

30
Q

nearsighted eye

A

too long for its lens

31
Q

farsighted eye

A

too short for its lens

32
Q

power of corrective lens

A

reciprocal of focal length

in diopters

33
Q

simple magnifyer

A

creates virtual image theta’>theta at a distance of 25cm

34
Q

25cm

A

normal closest distance for comfortable viewing

35
Q

compound microscope

A

objective lens forms a first image in barrel of instrument and eyepiece forms a final virtual image of the first image

36
Q

telescope

A

same idea as microscope but object far away

37
Q

reflecting telescope

A

objective lens replaced by concave mirror

(this eliminates chromatic abberations)

Physics 1 (10 decks)

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