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Optics > Angles Of Incidence > Flashcards

Angles Of Incidence Flashcards

0
Q

Magnification

A

m=-i/o

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1
Q

Optics equation

A

1/f=1/O+1/I

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2
Q

Focal length for spherical mirrors

A

F = 1/2 r

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3
Q

The diameter of the MIRROR is NOT = to what?

A

The diameter of a whole sphere

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4
Q

How does the magnification of an object change when the object approaches the focal point?

A

Magnification INCREASES

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5
Q

What occurs for a positive value of f, o, I, and m

A 
F= converging lens/mirror
O= real
I= real
M= upright
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6
Q

What occurs for a negative value of f, I, o, m?

A 
F= Diverging, lens/mirror
I= virtual
O= virtual
M= inverted
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7
Q

What do mirrors and lenses do to light respectively

A

Mirrors reflect light while lens’s refract light

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8
Q

Where is a real image located for a mirror and for a lens

A

A real image is located:
In front of a mirror
Behind a lens

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9
Q

Where is a virtual image located for a mirror and for a lens?

A

Lens: in front
Mirror: behind

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10
Q

CONVERGING SYSTEM:

A

Convex lens or concave mirror

  1. If o is greater than 2f: real, inverted, minimized image.
  2. If o is equal to 2f: real, inverted, and |m|=1 ( m is getting bigger as we are approaching focal point)
  3. If o is between 2f and f: real inverted and magnified
  4. Equal to f: no image; image at infinity
  5. Less than f: virtual upright and magnified
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11
Q

Diverging system:

A

Concave lens or convex mirror.

  1. Object us greater than f: VIRTUAL UPRIGHT MINIMIZED
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12
Q

MyopiA

A

Nearsighted I.e cannot see objects far away. We use a DIVERGING lens

Image is formed in front of the retina

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13
Q

Hyperopia

A

Farsighted. Ie cannot see close like when you get old..,

We use a CONVERGING LENS

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14
Q

For a two lens system ( contact lens and eye lens)

A

The image made by the 1st lens becomes the object of the 2nd lens

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15
Q

The power of a lens is=?

A

1/f

16
Q

A negative prescription means what then for the focal length?

A

A negative (-f) and therefore a DIVERGING lens! Yay that’s what we learned from the previous flash cards!!

17
Q

Law of reflection:

A

The angle of incidence equals the angle of reflection

18
Q

Snells Law

A

N1sin€1=n2sin€2

19
Q

Index of refraction

A

N= c/v

20
Q

When a light ray enters a higher medium

A

The light ray bends toward the normal

21
Q

When a light ray enters a lower medium

A

The light ray bends away from the normal

22
Q

What is the critical angle

A

(Sin€critical=30degrees)

I think the critical angle is 90 degrees

23
Q

When does 0 refraction occur (TOTAL INTERNAL REFLECTION)

A

When Snells law doesn’t apply

24
Q

Apparent depth

A

Apparent depth is always less than the actual depth. Why? Because our brain does not account for the bending of light that occurs when it enters a lower medium (air)

25
Q

Apparent Height

A

Always greater than the actual height

Optics (1 decks)

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