UV

Question 1

320-400 nm; longest wavelength, less energetic

Answer 1

UVA

Question 2

290-320 nm; Medium wavelength, more energetic

Answer 2

UVB

Question 3

<290 nm; shortest wavelength, most energetic

Answer 3

UVC

Question 4

Primary Source of UV

Answer 4

Sun

Question 5

Natural Sources of UV Rad

Answer 5

Sun, Lightning

Question 6

Artificial Sources of UV

Answer 6

Tanning beds, welding torches, UV lamps, some types of lasers

Question 7

2 Effect of UV rad on envi

Answer 7

ozone layer depletion
effect on phytoplankton

Question 8

6 UV rad intensity factors

Answer 8

time of day, season of the year, latitude, altitude, cloud cover, reflection

Question 9

UV levels higher between what time of day

Answer 9

10am-4pm

Question 10

3 parts of the eye affected by UV radiation

Answer 10

cornea, lens, retina

Question 11

2 Acute effects of UV to the eyes

Answer 11

photokeratitis, photoconjunctivitis

Question 12

chronic effects of UV radiation

Answer 12

cataracts

Question 13

chronic effect of UVB exp

Answer 13

macular degeneration

Question 14

chronic effect of UVA & UVB exposure

Answer 14

pterygium

Question 15

sunburn of the cornea and conjunctiva

Answer 15

photokeratitis

Question 16

inflammation of conjunctiva

Answer 16

photoconjunctivitis

Question 17

clouding of lens

Answer 17

cataracts

Question 18

damage to retina; central vision loss

Answer 18

macular degeneration

Question 19

growth on the sclera that can affect vision if it grows over the cornea

Answer 19

pterygium

Question 20

measure the strength of UV

Answer 20

UV index

Question 21

range of UV index

Answer 21

0-11+

Question 22

indicates risk level for sunburn and eye damage

Answer 22

UV Index

Question 23

you can safely stay outside

Answer 23

1-2 low

Question 24

seek shade during midday hours

uv index

Answer 24

3-7, moderate to high

Question 25

avoid being outside during midday hours

Answer 25

8-11, very high to extreme

Question 26

spf

Answer 26

sun protection factor

Question 27

measure of protection against UVB rays

Answer 27

spf

Question 28

blocks ~97% UVB | spf

Answer 28

spf 30

Question 29

blocks ~98% UVB rays | spf

Answer 29

spf 50

Question 30

upf

Answer 30

ultraviolet protection factor

Question 31

rating system for clothing

Answer 31

upf

Question 32

blocks more than 98% of UV radiation in clothing | upf

Answer 32

upf 50+

Question 33

look for ___ UVA and UVB protection in sunglasses

Answer 33

99-100%

Question 34

protects both eyes and skin around eyes

Answer 34

sun glasses

Question 35

provides nearly 100% protection against UVA and UVB rays

Answer 35

UV400 protection

Question 36

blocks wavelengths up to 400 nm

Answer 36

UV400 protection

Question 36

3 factors influencing choice of protection | UV protection

Answer 36

UV index level duration of sun exposure individual factors