Lesson 10 II Flashcards

1
Q

Lenses causing for parallel lines to converge are

A

Plus lenses

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2
Q

Lenses causing parallel lines to diverge are

A

Minus lenses

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3
Q

Wavelengths are measured in

A

no

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4
Q

What are three types of UV rays

A
  1. UVC
  2. UVB
  3. UVA
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5
Q

Sunglasses are recommended to protect from

A

UVA AND UVB

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6
Q

Light bends randomly on:

A
  1. Fresh LASIK eye
  2. Dirty/dry contact
  3. Dry cornea
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7
Q

Light bends towards the normal when it

A

Enters a medium more dense than the one it came from

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8
Q

Snell’s law helps determine

A

The angle at which light will bend as it passes from one substance to another ?

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9
Q

High-index lenses allow for

A

Thinner lenses

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10
Q

High-index lenses have a compressed central optical zone and also cause

A

A high degree of dispersion

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11
Q

What is chromatic aberration

A

Seeing color around images

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12
Q

What is the abbe value

A

The measurement used to measure amount of dispersion produced by different lenses

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13
Q

The lower the number of abbe value, the

A

Higher the amount of dispersion

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14
Q

Abbe value is also called

A
  1. NU value

2. Constringent

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15
Q

+ lenses are shaped

A

Convex

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16
Q
  • lenses are shaped
A

Concave

17
Q

Plano lenses have

A

One flat and one convex

18
Q

Meniscus lenses have

A

One concave one complex