First of all, I think it is important to define
what a laser is.LASER is anacronym that stands for
Light Amplification by the Stimulated Emission of
Radiation. According to several online
definitions a laser is:A device that creates a
uniform and coherent light that is very different
from an ordinary light bulb. Many lasers deliver
light in an almost-perfectly parallel beam
(collimated) that is very pure, approaching a
single wavelength.Laser light can be focused down
to a tiny spot as small as a single
wavelength.Laser output can be continuous or
pulsed and is used in a myriad of applications.
In other words, lasers typically emit only one
color of light(one wavelength or frequency), and
lasers often focus this light into a very narrow
There have been a few studies
investigating the effects of different types of
lasers on the growth and physiology of plants.
One study I found exposed plants to UV-B
ultraviolet radiation in order to damage their
tissues. The scientists then exposed the plants
to either He-Ne (helium-neon) lasers or to normal
red light radiation. They found that the plants
exposed to the lasers repaired their tissues more
rapidly and grew faster after being damaged by
ultraviolet compared to the plants exposed to red
radiation. This study indicated that certain
lasers can help plants recover from damage by
Another study suggested
that red laser light can increase the growth of
rice stalks, while blue laser light stimulates
flowering of rice and the production of grain.
Some scientists are now working to find
combinations of blue and red lasers that maximize
the yield (grain production) and growth rates of
rice in a process called photonics.
contrast, another view is that the high intensity
light beams that lasers emit typically cause
necrosis, or death, of plant tissues. In other
words, if you shoot a laser at a plant, it will
often leave a spot of dead plant tissue on the
leaf where the laser energy contacted the plant.
Whether a laser harms a plant, assists its growth,
or has no affect probably depends on a number of
factors including the plant type, the tissue type
(whether leaf, stem, root,etc.), the laser
wavelength (or frequency), the laser intensity
(number of photons per square cm per second), how
focused or narrow the laser beam is, and the
duration of time for which the plant is exposed to
I am not sure what studies have
looked at the effect of lasers on plant
growththrough different objects.
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