Lesson 10 II Flashcards
Lenses causing for parallel lines to converge are
Plus lenses
Lenses causing parallel lines to diverge are
Minus lenses
Wavelengths are measured in
no
What are three types of UV rays
- UVC
- UVB
- UVA
Sunglasses are recommended to protect from
UVA AND UVB
Light bends randomly on:
- Fresh LASIK eye
- Dirty/dry contact
- Dry cornea
Light bends towards the normal when it
Enters a medium more dense than the one it came from
Snell’s law helps determine
The angle at which light will bend as it passes from one substance to another ?
High-index lenses allow for
Thinner lenses
High-index lenses have a compressed central optical zone and also cause
A high degree of dispersion
What is chromatic aberration
Seeing color around images
What is the abbe value
The measurement used to measure amount of dispersion produced by different lenses
The lower the number of abbe value, the
Higher the amount of dispersion
Abbe value is also called
- NU value
2. Constringent
+ lenses are shaped
Convex