This is called photosynthesis, which means "making through light".

Beta carotene is a majorblue-absorbing accessory pigment, with a double peak at about 450 and 480 nm.As for how much light is needed: describes a plant growth unit illuminatedby 670 nm red and 470 nm blue LEDs.

The aim was to show that light is necessary for photosynthesis.

How does light intensity and duration affect the rate of photosynthesis?

Appendix A – Photosynthesis and Visible Light

During the process of photosynthesis, carbon dioxide plus water in the presence of sunlight, enzymes and chlorophyll produce glucose and oxygen as waste product.

Figure 24. Red light generated the highest rates of photosynthesis.

In addition to using chlorophylls and carotenoids for photosynthesis, plants use these and other photopigments for a wide variety of functions. The phytochromes Pr and Pfr, for example, respond to 660 nm red and 735 nm infrared radiation respectively, and in doing so induce seed germination and flowering, regulate leaf expansion and stem elongation, and trigger photoperiod and shade avoidance responses (see Appendix A).

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.

Blue and Red Light in Photosynthesis - excite Deutschland

The measured rate of photosynthesis as a function of absorbed wavelength correlates well with the absorption frequencies of chlorophyll a, but makes it evident that there are some other contributors to the absorption.

Why is Blue and Red Light important

Photosynthesis is the ability of plants toabsorb the energy of light, and convert it intoenergy for the plant. To do this, plants havepigment molecules which absorb the energy of lightvery well. The pigment responsible for mostlight-harvesting by plants is chlorophyll, a greenpigment. The green color indicates that it isabsorbing all the non-green light-- the blues(~425-450 nm), the reds and yellows (600-700 nm). Red and yellow light is longer wavelength, lowerenergy light, while the blue light is higherenergy. In between the two is green light(~500-550 nm). It seems strange that plantswould harvest the lower energy red light insteadof the higher energy green light, unless youconsider that, like all life, plants first evolvedin the ocean. Sea water quickly absorbs thehigh-energy blue and green light, so that only thelower energy, longer wavelength red light canpenetrate into the ocean. Since early plants andstill most plant-life today, lived in the ocean,optimizing their pigments to absorb the reds andyellows that were present in ocean water was mosteffective. While the ability to capture thehighest energy blue light was retained, theinability to harvest green light appears to be aconsequence of the need to be able to absorb thelower energy of red light.

Photosynthesis requires the following resources; Carbon Dioxide, Water and light.

Botany: Why is photosynthesis maximum in red light? …

To make these discoveries, Bryant's team used a variety of biological, genetic, physical, and chemical methods in order to learn how this unusual photosynthesis apparatus works as a whole. The team's investigations included biochemical analyses, spectroscopic analyses, studies of the structures and functions of proteins, profiles of gene-transcription processes, and sequencing and comparisons of cyanobacterial genomes. "Our comparative genome-sequence analyses of different cyanobacteria strains revealed 12 additional strains that also appear to be able to use far-red light for photosynthesis," Bryant said.

As out lined in the introduction, light is essential for the process of photosynthesis.

Red light has the longest wavelength and the least ..

Red light LEDs are usually combined with infrared and amber light LEDs in a device made for treating the skin. Infrared isn’t visible to the human eye. Red, amber, and infrared light waves are longer than other colors and penetrate deeper into the skin. Red light reaches about 1/3 of an inch deep, and infrared goes about an inch down into tissue. This means it penetrates through the epidermis and into the dermis to reach the collagen fibers.

Aim: To see if raising the light intensity increases the rate of photosynthesis.

Light Absorption for Photosynthesis

Chlorophyll B is the main "accessory pigment" in green algae and"higher plants", and serves to utilize light at wavelengths not absorbed wellby Chlorophyll A and transfer the energy from such wavelengths to the process that uses Chlorophyll A.