ALS

Question 1

What can be detected with short-wave UV light?

Answer 1

Latent prints

Question 2

What is important to keep in mind when using short-wave UV light?

Answer 2

It is DNA destructive

Question 3

What can be visualized under long wave UV light?

5

Answer 3

Blood
Semen
Spittle
Saliva
Urine

Question 4

How does blood appear under long wave UV?

Answer 4

Black

Question 5

How do semen, spittle, saliva and urine appear under long wave UV?

Answer 5

They fluoresce

Question 6

What colour of light is in the range of 415-485 nm?

Answer 6

Violet/blue light

Question 7

What can be visualized under 415-485 ALS?

5

Answer 7

Bite marks and bruising on human skin
Latent blood under fluorescein reactions
Prints developed with CA fuming and stained with Rhodamine 6G, ardrox
Biological fluids
Prints developed with ninhydrin

Question 8

What colour of light is within the 485-530 nm range?

Answer 8

Blue

Question 9

What can be visualized under 485-530 ALS?

3

Answer 9

Fluids
Fibers
Hairs

Question 10

What colour is within the range of 570-700 nm?

Answer 10

Orange to red

Question 11

What can be visualized under 570-700 ALS?

2

Answer 11

Ink
Depending on age, subcutaneous bruising

Question 12

What light falls in the range of 700-2000 nm?

Answer 12

IR

Question 13

What can be visualized under 700-2000 nm ALS?

4

Answer 13

Blood
GSR
Soot
Bruising both on the living and corpses

Question 14

What else is IR light useful for?

2

Answer 14

Good for contrast in photography
Can remove background colours

Question 15

What type of light is 12,000 nm?

Answer 15

Heat energy, thermal imaging

Question 16

What is the benefit of using thermal imaging?

Answer 16

Can see in total light

Question 17

Give examples of instances where thermal imaging could be helpful.

4

Answer 17

Surveillance
Locating decomposing bodies
Locating fire hot spots
Locating recent and older tire marks