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2nd sem > forensic finals > Flashcards

forensic finals Flashcards

1
Q

The means by which the object’s distance is estimated or calculated to form a sharp or clear image refers to

A

focusing

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1
Q

Isthat surface of the sensitized material which actually contains the lightsensitive materials and which appears glossy in a developed material?

A

emulsion

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2
Q

Acamera and a human eye have a lot in common. What is that part of the humaneye, which is almost, corresponds to the shutter of a camera?

A

eyelid

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3
Q

What type of lens is that whose center is thinner and the sides are thicker?

A

diverging

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4
Q

What contraption or device is used to block the path of light passing through the lens exposing the sensitized material?

A

shutter

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5
Q

Which indicates the speed of the lens or the amount of light passing through the lens in proportion to its focal length?

A

f numbers

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6
Q

What part of the camera is responsible for determining the intensity of light coming from the object being photograph?

A

light meter

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7
Q

A film that is sensitive to ultraviolet light up to green colors only is called

A

orthochromatic

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8
Q

That sensitized material that produces positive print is called

A

photographic paper

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9
Q

The photographic rays with the longest wavelength ranging from 700 to 1000 millimicrons refers to

A

infra red ray

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10
Q

The combination of blue and green produces

A

cyan

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11
Q

The combination of green and red produces what color?

A

yellow

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12
Q

The combination of red and blue produces what color?

A

magenta

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13
Q

Once the light hits a mirror and it bounce back. This called

A

reflected

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14
Q

When the light hits a transparent glass which would allow the light to pass through its medium. This refers to

A

transmitted

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15
Q

When the light hits a dark colored object and prevents it from either bouncing or passing through. This refers to

A

absorbed

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16
Q

The type of light that produces different sensation when reach the human eye. It is the type of light, which is capable of exciting the retina of the human eye. This refers to

A

visible light

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17
Q

Lights in which their wavelength are either too short or too long to excite the retina of the human eye i.e. X-ray, Ultra-violet and Infra-red lights. This refers to

A

invisible light

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18
Q

ASAis also known as

A

American Standards Association

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19
Q

ISOis also known as

A

International Standard Organization

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20
Q

It is defined as a contraption or device that used to black the path of light passing through the lens

A

shutter

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21
Q

– a shutter that is located in the lens (usually between the elements of the lens). It is made up of metal leaves and its action from the center toward the side, then close back to the center

A

Central Shutter –

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22
Q

It is usually made up of cloth curtain but also available in metal.r moves vertically to make an opening, while other camera models use horizontally moving shutter.

A

Focal Plane Shutter

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23
Q

r is usually located on top of the camera. This will allow you to change the shutter speed, to control the length of time the film will be exposed to the light that pass through the diaphragm opening.

A

A shutter speed

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24
Q

it continuously keeps the shutter to be in open position while still pressing the shutter release button.

A

B – Setting –

25
Q

it keeps the shutter in an open position in one press, and close it back by another click

A

T – Setting -

26
Q

– it is located at the back of the camera. Its function is to hold firmly the sensitized material in its place during exposure to prevent the formation of multiple or blurred image of the subject.

A

Holder of Sensitized Material/Film Holder

27
Q

is a transparent homogenous medium, which absorbs and transmits different light rays passing through it.

It is usually made up of small disk of colored glass or sometimes from gelatin, cemented between glass plates.

A

Photo filter

28
Q

is used to properly determine the necessary increase in “exposure time or lens opening” to compensate from the subtraction of light caused by the filter.

A

Filter factor

29
Q

It is used to change the response of the film so that all colors are recorded at approximately relative brightness value as seen by the eyes.

allows you to use indoor film in daylight, and daylight films in indoor photography.

A

Correction Filter

30
Q

This filter is used to change relative brightness values in the photograph, so that two colors, which would otherwise be recorded as nearly the same, might exhibit different brightness and great tonal difference in the final print.

A

Contrast Filter

31
Q

This filter is used to eliminate or reduced the effect of serial haze that makes distant objects appeared blurred and fuzzy in the photograph.

A

Haze Filter

32
Q

A grayish colored filter used for reducing the amount of transmitted light uniformly without changing the color value.

A

Natural Density Filter

33
Q

These are filters capable of reducing or eliminating reflections on highly reflective surfaces, therefore allowing you to photograph objects so closed in a transparent glass, or subjects with a highly reflective background.

A

Polarizing Filters

34
Q

refers to the process of making latent photographic image visible and permanent. This involves the production of negatives from an exposed film and positive prints from the negative.

A

Chemical processing

35
Q

it is the process of reproduction. Exposed silver halides are reduced into metallic silver. There is a separate developer for Film which uses D – 76, and another for photographic paper that uses Dektol. The normal developing time is 6 – 7 minutes.

A

a.Development –

36
Q

– Elion or Hydroquinone reduced the exposed silver halide to metallic silver.

A

Reducer or Developing Agent

37
Q

– Sodium Sulfite prevents the formation of stains to the developer product.

A

Preservative

38
Q

Sodium Carbonate accelerates the process of reduction

A

Accelerator

39
Q

Potassium Bromide reduce fog on the latent image.

A

Restrainer or Fog Preventer –

40
Q

-Less use of chemical, the less developing time, while the more number of used the more developing time.

A

2.Strength, Composition and Concentration of chemicals

41
Q

-The higher the temperature the less the developing time, the lower the temperature the lower the developing time.

A

3.Temperature of the Developing Solution

42
Q

-The more the agitation the less the developing time, the less the agitation the more developing time.

A

4.Agitation or Stirring During Development

43
Q

An intermediate bath between the developer and fixer, it is usually a combination of water plus acetic acid or just plain water.
Primarily its function is to prevent the contamination of the two chemical solutions. This is done up to 30 seconds.

A

.Stop – Bath –

44
Q

– the process of removing unexposed silver halides remaining in the emulsion after the first stage of development of the latent image. This is done from 20 to 30 minutes.

A

Fixation

45
Q

Hypo or Sodium Thiosulfate responsible for dissolving the unexposed silver halide. This is done to eliminate the light sensitive characteristics of the sensitized material.

A

Dissolving Agent –

46
Q

Sodium Sulfite prevents the precipitation of sulfur. It also prevents the oxidation of the developing solution carried over in the fixing bath.

A

Preservative –

47
Q

Boric and Acetic acid is the anti – staining agent of the fixing solution. They neutralize carried over chemicals from the developer. This will prevent the weakening of the fixing solution and staining the image produced on the surface of the sensitized material

A

.Neutralizer –

48
Q

. – Potassium Alum hardens the gelatin of the sensitized material, which was softened in the developing solution. This makes the metallic silver permanent.

A

Hardening Agent

49
Q

Is an art or science which deals with the study of principles of photography, the preparation of photographic evidence and its application to police work.

A

A.Police Photography

50
Q

Is the art or science of photographically documenting a crime scene and evidence, for laboratory examination and analysis for purposes of court trial.

A

.Forensic Photography

51
Q

is the taking of photograph of an object in much reduced sized or providing tiny images of large objects.

A

Microphotography

52
Q

-Provide Photographic image that will give information to assist the investigation and subsequent prosecution of criminal cases.
-Serves as visual permanent record of location and condition of different aspects of the scene and the vital evidence of proof

A

General Consideration

53
Q

-To provide the investigator and prosecutor with an accurate pictorial presentation of the crime scene,
-To aid in questioning the suspect and witnesses when their sworn statement are being taken

A

Function of Crime Scene Photography

54
Q

-The photographs must shows WHERE and HOW the crime was committed
Photographs should not be only limited to the immediate vicinity where the crime took place (crime scene), but as well as to those adjacent areas where important acts took place before or after the commission of the crime

A

Crime Scene Photographs

55
Q

photograph should include various places which are part of the crime scene.

A

Location –

56
Q

. photographs must clearly shows the type of crime committed.

A

Nature –

57
Q

it must be taken in sequential fashion to establish relevance of evidence to the other to establish their connection to the accused.

A

Result –

58
Q

–photographs represent the outgrowth of the investigation. (autopsy, bruises and wounds on live victims or suspects)

A

Follow – up

59
Q
A

Composite Exhibit

60
Q

– this is done by placing a part of one photograph over and in careful alignment with the other

A

Matching Photographs

61
Q

– a positive transparency of one is placed over the other until the outline coincide

A

Matching Transparencies

2nd sem (14 decks)

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