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Light First

Did the universe expand faster than the speed of light in the first few seconds?
I was watching a Discovery Channel show about the first few seconds after the Big Bang. Dr Michio Kaku said that the universe was many thousand light years across within the first second. Doesn't this contradict the fact that nothing is faster than the speed of light?
The expansion of the universe is not a speed at all; it is a percentage per time. All cosmological distances increase by the same fraction every second. This means that regardless of how fast it is expanding, some objects in the universe will be receding at greater than c.
The restriction to c is a Special Relativistic restriction; it does not apply to distant bodies in General Relativity. The distant objects are not really moving at the speed of light; it is the intervening space that is stretching.
Grieves - Lightspeed
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250 Watt HPS GROW LIGHT BULB NEW CLEAR 24,000 HOUR! | ![]() |
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US $32.99 | 28d 12h 32m |
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400 W METAL HALIDE GROW LIGHT BULB NEW! 8 INCH ED-28 | ![]() |
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US $32.99 | 14d 11h 9m |
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When dyeing your hair 2 different colours, do you use the dark or light dye first?
I have been dyeing my hair unnatural colours for years, yet I have never really done anything two-toned. My hair is currently dark green, and I will be re-bleaching my roots and another chunk. I want to dye the bleached chunk bright yellow, but I don't know which dye to use first...If I use the dark first and rinse it out, I could probably just shampoo it out of the bleached chunk if I need to. Does anyone have any experience with this?
light first. but separate treatments with a day or two.
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600D Hydroponics Plant Grow Tent Box Room 118x60x79 Large Window Growing Cabinet | ![]() |
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Nitrogen Boost supports large heavy feeding plants during the vegetative cycle. | ![]() |
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Large Plants

Why are there no large moss plants?
And what advantages does a seed have over a spore?
How is water important to the reproduction of mosses and ferns? I've been looking through my science book for 2 hours and cannot find the answer. Thanks in advance!
> "Why are there no large moss plants?"
Mosses have no vascular system to transport water and metabolites around, so they rely on diffusion - which only works for small distances. So they are limited in size.
> "And what advantages does a seed have over a spore?"
Seeds contain their own energy-store; spores need an available external energy source before they can germinate.
> "How is water important to the reproduction of mosses and ferns?"
The gametophyte stage of the life-cycle of mosses and ferns depends on water to transport sperm to eggs.
KIST, Rwanda, Large-scale biogas plants - Ashden Award winner
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600D Hydroponics Plant Grow Tent Box Room 118x60x79 Large Window Growing Cabinet | ![]() |
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Nitrogen Boost supports large heavy feeding plants during the vegetative cycle. | ![]() |
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US $199.00 | 4d 13h 46m |
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US $47.95 | 6d 7h 37m |
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Growing large plants in the shade?
What are some cool lookin large plants that would grow in the shade along my creek?
I like combination of Euonymus, Forthisia, Mountain Laurel and Bayberry (Myrica faya).
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US $94.90 | 1d 12h 10m |
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Blue Plant Light

What helps a plant produce more oxygen under a blue light then regular light and why?
I did an experiment in my class where we put to cups of radish seeds under a regular light for five minutes and then switched the light to a blue light and the experiment shows that the plant produces more oxygen under a blue light but I am having troubles finding research to put in my analysis to help prove this....etc...
Ok, so the amount of oxygen that is produced by the plant is a measurement of the rate of metabolism of the plant. Specifically, the rate at which photosynthesis is taking place. So what you are seeing experimentally is that under blue light, photosynthesis takes place faster relative to white light. Why?
This is where you need to do a little research into the wavelengths of light. You can check out the first link below for more information but the key information is this.
White light is a mixture of various wavelengths of light.
With blue light, all your light is around 475 nm in wavelength.
Now chlorophyll selectively absorbs light at certain wavelengths and reflects others. If you check out the second link below you can see that one of the peak absorbtion wavelengths for chlorophyll is right around 475 nm. So that means that if you put the plant under white light, much of the light is being reflected and not used for photosynthesis, whereas, if you put it under a blue light, most of the light is being absorbed and utilized for photosynthesis.
Flashing Blue Light Seen Above Exploded Nuclear Reactor
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US $94.90 | 1d 12h 10m |
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US $431.99 | 26d 10h 52m |
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US $33.29 | 27d 15h 29m |
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US $1,393.25 | 19d 11h 33m |
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US $50.34 | 19d 10h 55m |
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why is red light better than blue on the plant growing proccess?
It has to do with the absorption wave lengths .....
The red region has a utilization peak around 660-670 nm for Chlorophyll A and around 635-645 nm for Chlorophyll B, depending on the source of information. Plants generally make good use of all red wavelengths except for ones much longer than 670 nm. 700 nm and longer is close to useless for plants.
The blue utilization peaks of chlorophyll are mostly reported to be around 430-440 nm for Chlorophyll A and around 453-470 nm for Chlorophyll B. Unlike the red peaks, the blue peaks are usually shown with substantial asymmetry indicating that wavelengths shorter than peak are used well while wavelengths longer than peak are not used well. Beta carotene is a major blue-absorbing accessory pigment, with a double peak at about 450 and 480 nm.
Red Light Red Light is in the vicinity of the first peak of a plants light absorption spectrum (660nm) and it contributes to the plant photosynthesis. Red light, when combined with blue light, encourages flowering. It can also be used in higher doses to stimulate flowering, seeding and fruiting.
Blue Light Blue light is responsible primarily for vegetative growth (leaf). It is known that chlorophyll has the second distinct absorption peak in the vicinity of blue light wavelengths (450nm). The blue light is also indispensable to the morphologically healthy growth plant. There is also more sunlight energy in the blue-green wavelengths,
so when you look at the functions by each color, the red seems to be more involved with growth and blue more to do with leafing and health.
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Lucas Formula Bloom Micro Hydroponics general flora florabloom floramicro | ![]() |
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Koolbloom Ripening Formula Dry General Hydroponics 2-45-28 2.2 lb For Late Bloom | ![]() |
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General Hydroponics Formula
Advanced Nutrients Vs. General Hydroponics & Friends Nutrient Shootout Coco Grow!!! PT10
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Lucas Formula Bloom Micro Hydroponics general flora florabloom floramicro | ![]() |
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US $24.75 | 16d 5h 52m |
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US $22.89 | 2d 11h 21m |
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