Background
"why red light is used inside the submarines?"?
Best Answer (from Yahoo Answers):
I served on Subs during the 70's. On a sub, there is no "night and day"
The "day" (at sea)was actually only 18 hrs vs 24 as there were three
watches consisting of 6 hours each. You work 12 with 6 off to
sleep,study etc. then back to work. Your body clock got very confused,
you might get up from sleep only to be served dinner or lunch rather
than b'fast. Red lighting in the control room (the only place other than
in berthing that the red lights were used.) was only used in
preparation of coming to Periscope depth (or the rare surface) or during
battle stations when it was dark topside Rig for red served two
purposes.First was to acclimate the eyes to darkness of those that were
in preparation of going topside during the darkness, and to prevent
light from being emitted from the raised periscope. Even though there
was a "blackout blind" in the scopes, the crew could not take the risk
of light being emitted as it would be able to be seen for miles. source
More (excerpt):
Red light has minimal effect on night vision because its energy level
is so low that the eye doesn't register it strongly enough to produce a
compensatory reaction. In near-absolute darkness, both cone and rod cells compensate by pumping
out more light-sensitive chemicals. The more time spent in darkness,
the more chemicals are produced. In about ten minutes, cone cells max
out, producing as much as they are capable of holding.- Hawk
Submarine Questions of the Week
1. Like those giving the above answers, U.S. Submariners probably learned about rods and cones, "the
two kinds of receptors in retinas of your eyeballs" during Sub School. But there are several more light receptors in your retina.
One of them is essential to maintaining the
body's clock. Disruption of the circadian rhythm not only affects body temperature,
alertness, appetite, and hormone secretion, etc.
, research now suggests it may contribute to
depression, immunity, and
disease.
Unlike rods and cones, which send their signals to the brain's visual cortex, the retinal light receptor governing your body clock sends information to another part of the brain.
What is that special are of the brain called and where is it located?
2. The
"DoD's First Choice for Undersea Biomedical Research" recently announced a collaborative study to phase-shift and/or phase-lock circadian rhythms to optimize operational readiness
. Its overall mission
to protect the health and enhance the performance of warfighters through submarine, diving and surface biomedical research solutions (see Question 4. below for a simpler statement of goal). What is the official name of "DoD's First Choice for Undersea Biomedical Research"?
3. Who are the principle collaborators with the military on this new study, and from what institution do they come?
4. In
straightforward terms one of the civilian collaborators was described by an authoritative publication as
"working with the U.S. Navy to investigate how light can increase performance and alertness in submariners."
Identify the authoritaive, civilian publication.
ANSWERS: Wednesday, 30 OCT 2013
Submarines are always silent and strange.
working
with the U.S. Navy to investigate how light can increase performance
and alertness in submariners. - See more at:
http://news.rpi.edu/content/2013/10/25/mariana-figueiro-elected-fellow-illuminating-engineering-society#sthash.EbEhwhKy.dpuf
working
with the U.S. Navy to investigate how light can increase performance
and alertness in submariners. - See more at:
http://news.rpi.edu/content/2013/10/25/mariana-figueiro-elected-fellow-illuminating-engineering-society#sthash.EbEhwhKy.dpuf
Labels: alertness, blue, body clock, circadian, depression, disease, DoD, immunity, red lighting, rig, visual cortex, white
