為什么在犯罪現場使用紫外線手電筒？

紫外線手電筒是犯罪現場調查人員的有用工具，因為它們能夠檢測肉眼難以看到的物質。

紫外線 （UV） 是一種人眼看不見的光，波長約為 10-400 納米。這種類型的燈具有許多獨特的特性，使其在各種情況下都很有用，包括犯罪現場。

紫外線手電筒在犯罪現場的主要用途之一是檢測某些物質。許多物質，如體液和藥物，在暴露于紫外線時會發出熒光或發出可見光。

這使得它們很容易在犯罪現場被發現。此外，紫外線手電筒可用于檢測肉眼可能看不見的指紋。

在某些情況下，這可以為破案提供有價值的證據。紫外線手電筒也可用于檢測人身上或房間內的異物。這包括在犯罪過程中可能留下的物品。

紫外線可以幫助識別這些物體，即使它們肉眼不可見。

除了幫助檢測證據外，紫外線手電筒還可用于法醫攝影。

紫外線可用于拍攝證據的照片，而無需閃光燈攝影，這可能會損壞或洗掉證據。

對于犯罪現場調查人員來說，這可能是一個非常寶貴的工具。

總體而言，紫外線手電筒對于犯罪現場調查人員來說是一種有價值且多功能的工具。

它們可用于檢測各種物質，以及肉眼可能不可見的異物和證據。

此外，它們可用于拍攝照片，而無需閃光燈攝影。

這些功能使紫外線手電筒成為犯罪現場調查人員的寶貴工具。

Why Are Uv Flashlights Used In Crime Scenes?

UV flashlights are a useful tool for crime scene investigators due to their ability to detect substances that are otherwise difficult to see with the naked eye.

Ultraviolet (UV) light is a type of light that is invisible to the human eye and has a wavelength of approximately 10-400 nanometers.

This type of light has many unique properties, which make it useful in a variety of situations, including crime scenes.

One of the primary uses for UV flashlights in crime scenes is to detect certain substances.

Many substances, such as body fluids and drugs, will fluoresce, or emit visible light, when exposed to UV light.

This makes them easy to spot in a crime scene.

In addition, UV flashlights can be used to detect fingerprints, which may not be visible to the naked eye.

In some cases, this can provide valuable evidence in solving a crime.

UV flashlights can also be used to detect foreign objects on a person or in a room.

This includes objects that may have been left behind during a crime.

The UV light can help to identify these objects, even if they are not visible to the naked eye.

In addition to helping to detect evidence, UV flashlights can also be used for forensic photography.

UV light can be used to take pictures of evidence without the need for flash photography, which can damage or wash out evidence.

This can be an invaluable tool for crime scene investigators.

Overall, UV flashlights can be a valuable and versatile tool for crime scene investigators.

They can be used to detect a variety of substances, as well as foreign objects and evidence that may not be visible to the naked eye.

In addition, they can be used to take photos without the need for flash photography.

All of these functions make UV flashlights an invaluable tool for crime scene investigators.