Why is a forensic lamp powerful?
a.
it emits visible light and infrared light.
b.
it emits infrared light and ultraviolet light.
c.
it combines the power ultraviolet light and gamma light.
d.
it combines the power of infrared, ultraviolet, and visible light.

forensic science

Forensic lamps are high energy light sources that emit all the three types of lights - ultraviolet light, visible light, and infrared light.

Option D.

Forensic lamps are important tools in the forensic investigations at any crime scenes. It helps the investigators to detect any sort of fingerprints, body fluids, hair and fibers, bruises, bite marks, wound patterns, shoe and foot imprints, gun shot residues, semen marks, drug traces, questioned documents, bone fragment detection, etc. Most importantly, it helps in the detection of latent finger prints that are important evidence in any crime scenes.

The forensic lamps are made up of powerful light sources that can divide the light according to different groups of wavelengths that help in the easy visualization of the evidence. The three types of visualization includes fluorescence ( as in semen mark), absorption (as in blood serum mark) or oblique lighting( gun shot residues).

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.