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’=

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
camera - what controls the amount of light
shutter speed an aperture
26
camera - intensity is inversely proportional to
square of f-number
27
f number
f/D
28
refraction at surface of cornea forms
real image on retina
29
what adjusts for object distances
squeezing lens
30
nearsighted eye
too long for its lens
31
farsighted eye
too short for its lens
32
power of corrective lens
reciprocal of focal length in diopters
33
simple magnifyer
creates virtual image theta'>theta at a distance of 25cm
34
25cm
normal closest distance for comfortable viewing
35
compound microscope
objective lens forms a first image in barrel of instrument and eyepiece forms a final virtual image of the first image
36
telescope
same idea as microscope but object far away
37
reflecting telescope
objective lens replaced by concave mirror (this eliminates chromatic abberations)