WorksheetsUV and IR radiation
Total questions: 20
Worksheet time: 11mins
Which of the following does not reach the earth surface
UVA
UVB
UVC
UVD
What does radiation mean?
how strong something is
energy that comes from a source in the form of rays you cannot see
the power of something
Ultraviolet or UV radiation are________ rays
invisible
visible
colourful
How many types of UV rays are there?
5
2
3
What are the 3 types of UV rays?
UVB
UVA
UVC
UVF
How can you protect yourself from UV rays?
expose your skin
wear sunblock
sit outside for 5 hours per day
Does shade provide complete protection from UV radiation?
Yes (full shade provides 100% protection)
No (shade provides some protection, but you should also consider reflected UV radiation)
Can you see UV radiation with your eyes?
Yes
No
When light or longer wavelength electromagnetic radiation is absorbed in matter, it is generally converted into _________________________.
thermal energy (heat)
kinetic energy
potential energy
chemical energy
Following are symptoms of photokeratitis
sandy feeling
excessive lacrimation
colour blinding
redness
Stromal damage due to UV exposure can usually resolve within
1 day
2 days
1 week
2 weeks
UV exposure to conjunctival layer usually present with
Pterygium
Conjunctival Chemosis
Conjunctivitis
Pinguecula
The very first sign of UV radition effects of Crystalline lens would be
Y suture
Posterior subcapsular cataract
Peeling of the anterior capsule
Yellowing of the central lens
Choose the characteristics of anterior Uveitis due to UV radiation
Fibrinous exudates
Hypophyon
Posterior synechiae
neovascularization
Aphakics tends to get the following if they did not use the UV absorptive lenses
Retinal blanching
Large optic disc
tygroid fundus
Chromatopsia
Is infrared visible to human eyes?
True
False
Who discovered infrared light?
Justin Baehler
Albert Einstein
Thomas Edison
William Herschel
Shorter wavelength IR, within 750- to 900-nm waveband, heat the endothelium to a greater degree than the epithelium because of the greater ability of this waveband to penetrate the cornea. TRUE or FALSE
TRUE
FALSE
IR of which wavelength band are most like to induce aqueous Flare
900nm
800nm
700nm
600nm
Infrared Cataracts are produced by indirect transmittance of the heat from iris to the lens. TRUE or FALSE
TRUE
FALSE
