- #1
bogdan
- 188
- 0
I'm interested in anything you have...links...sugestions...ideas about this field...
Click For Summary
Discussion Overview
The discussion focuses on the effects of modulated laser light on plant growth, particularly the use of pulsed lasers at low frequencies and their potential to stimulate photosynthesis. Participants explore various aspects of this topic, including specific wavelengths and mechanisms involved.
Discussion Character
- Exploratory, Technical explanation, Debate/contested
Main Points Raised
- One participant expresses a general interest in the effects of lasers on plant growth and seeks information and studies related to this field.
- Another participant requests clarification on the specifics of the inquiry, noting that the effects could vary significantly based on wavelength and power.
- A participant specifies interest in pulsed lasers within the frequency range of 5Hz to 20KHz and their ability to stimulate plant growth, while indicating that the exact wavelength is less critical.
- One participant emphasizes the importance of wavelength, referencing the absorption spectrum of chlorophyll and suggesting that wavelengths in the blue range would be most effective for stimulating growth.
- A participant questions the mechanisms that might be influenced by laser coherency or pulsing, mentioning that fluorescent lighting also pulses but lacks known specific effects related to illumination equivalence.
Areas of Agreement / Disagreement
Participants do not reach a consensus on the effects of pulsed lasers on plant growth, with differing opinions on the significance of wavelength and the mechanisms involved. The discussion remains unresolved regarding the specific impacts of pulsed laser light.
Contextual Notes
There are limitations in the discussion regarding the lack of studies on pulsed light effects and the dependence on specific definitions of terms like "stimulation" and "growth." Additionally, the discussion does not resolve the mathematical or experimental aspects of the claims made.
- #2
Moonbear
Staff Emeritus
Science Advisor
Gold Member
- 11,959
- 54
Can you be a bit more specific in your question? What wavelength or power? Otherwise, the answer could range from absolutely nothing, to stimulation of a particular set of photopigments, to burning a hole through it.
- #3
bogdan
- 188
- 0
Well...I'm interested in the stimulation of growth of plants...especially if there are any studies about pulsed lasers at low frequency ( 5Hz-20KHz ), with wavelengths that stimulate photosynthesis ...the wavelength doesn't matter too much...I just want pulsed lasers that stimulate plants to grow 
- #4
jim mcnamara
Mentor
- 4,789
- 3,853
The wavelength matters a lot - The absorption spectrum of chlorophyll
would indicate that for max effect you would want the wavelength probably centered in somewhere in the "blues" circa
chlorophyll a : 425nm
chlorophyll b : 460nm
unless you have a "sunlight balanced" laser light source
I don't know of any studies on the effect of pusled light, so I can't comment about that.
would indicate that for max effect you would want the wavelength probably centered in somewhere in the "blues" circa
chlorophyll a : 425nm
chlorophyll b : 460nm
unless you have a "sunlight balanced" laser light source
I don't know of any studies on the effect of pusled light, so I can't comment about that.
- #5
NoTime
Science Advisor
Homework Helper
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What mechanisim do you think would be affected by either coherency or pulsing?
Ordinary florescent lighing pulses at 60Hz, even though you don't see it.
I don't know of any particular effects associated with that, given equivilent applied illumination.
Ordinary florescent lighing pulses at 60Hz, even though you don't see it.
I don't know of any particular effects associated with that, given equivilent applied illumination.
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