OL13

Question 1

Visible spectrum range?

Answer 1

380-780nm

Question 2

photopic sensitivity curve peak wavelength ?

Answer 2

550nm

Question 3

UV C wavelength

Answer 3

<280nm

Question 4

UV B wavelength

Answer 4

280nm- 315nm

Question 5

UV A wavelength

Answer 5

315nm- 380nm

Question 6

Infrared wavelength

Answer 6

> 780 nm

Question 7

ocular transmission for cornea?

Answer 7

270nm 3000nm

Question 8

ocular transmission for aqueous humour?

Answer 8

290nm to 2700nm

Question 9

ocular transmission for crystalline lens?

Answer 9

310nm (young)

375nm to 2500nm (old)

Question 10

ocular transmission for vitreous humour?

Answer 10

290nm to 1600nm

Question 11

which wave from electromagnetic spectrum damages cornea?

Answer 11

UVA and UVB

Question 12

which wave from electromagnetic spectrum is implicated in cataract and AMD?

Answer 12

UVA and UVB

Question 13

which wave from electromagnetic spectrum is responsible for glass blowers cataract?

Answer 13

IR hazardous > 1400nm

Question 14

UV blocking filters can block which wavelength?

Answer 14

below 360nm

Question 15

which material can and cannot block UV radiation?

Answer 15

CR-39 can’t block UV light unless a casting is applied but Polycarbonate can block UV

Question 16

how can we achieve the best protection from IR absorbing glass?

Answer 16

addition of ferrous oxide- usually pale green in colour