11.9: Test Questions

1. Light is measured in frequency or wavelengths, as measured in:

a. micrometers

b. nanometers

c. gigameters

d. millimeters

2. The ability of light to bend when passing through glass or water is called:

a. reflection

b. absorption

c. refraction

d. contrast

3. Light bounced off a surface is called:

a. reflection

b. absorption

c. refraction

d. contrast

4. In forensic photography, this is used solely to sharpen the entire image and to ensure the entirety of the image can be viewed apart from its background or surroundings:

a. reflection

b. absorption

c. refraction

d. contrast

5. This photographic technique allows the forensic technician to remove overwhelming color backgrounds in order to better visualize developed or enhanced evidence:

a. color separation

b. color enhancement

c. color subtraction

d. color elimination

6. Bloodstains are best visualized under this wavelength:

a. 395nm

b. 450nm

c. 500nm

d. 415nm

7. Fluorescent scales are not recommended in photography using ALS because:

a. The scale may “bleed” over onto the item of evidence being photographed

b. The color contrast of the scale may overwhelm the item of evidence being photographed

c. Fluorescent scales cannot be properly photographed using painting with light

d. The camera cannot properly color-balance the scale and the item of evidence

8. This spectrum of light is best used to visualize gunshot residue and bloodstains on dark clothing:
   1. Short-wave ultra-violet
   2. Long-wave ultra-violet
   3. White light
   4. Infra-red

9. This range of the electromagnetic spectrum is considered visible light to the human eye:
   1. 190nm-430nm
   2. 290nm-590nm
   3. 400nm-700nm
   4. 10nm-230nm

10. When using ALS in the 430nm-490nm range, what color barrier filter should be used?
    1. Red
    2. Green
    3. Yellow
    4. Orange

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