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Free Essays Biology Lab Report on the Effects of Photosynthesis

So by level of light you probably mean lightintensity which is something that can be measured.Light intensity is usually defined as theenergy hitting an area over some time period.So in the case of a plant, a higher lightintensity means more packets of light called“photons” are hitting the leaves. As you rise fromlow light intensity to higher light intensity, therate of photosynthesis will increase because thereis more light available to drive the reactions ofphotosynthesis. However, once the light intensitygets high enough, the rate won’t increase anymorebecause there will other factors that are limitingthe rate of photosynthesis. A limiting factorcould be the amount of chlorophyll molecules thatare absorbing the light. At a very high intensityof light, the rate of photosynthesis would dropquickly as the light starts to damage the plant.

See diagrams c
& d below…

Diagram c Diagram d

Results obtained from experiment : "Investigating if light intensity
effects the rate of photosynthesis in an aquatic plant."

As mentioned previously, the results I have obtained from the
experiment will be of measured in 5 intervals, ranging from 0cm
-100cm, 1 repeat reading taken as well as an original reading & an
average of the 2 results calculated.

 Graph: Shows the effect of light intensity on the process of photosynthesis in an aquatic plant.

Photoelectric Effect - Light | Quantum Mechanics | …

I am happy with the experiment as I proved that light intensity has an effect on the rate of photosynthesis.

6CO + 6H O ® C H O + 12O (in the presence of light energy and chlorophyll) Aim- The aim of the experiment is to determine what effect light intensity has upon the rate of photosynthesis of Canadian Pondweed (Elodea)....

Advanced technology allows quick determination of a light source's ability to promote photosynthesis. The availability of two devices has made this possible: A 'photosynthesis meter' (a PAM fluorometer, which allows in-situ determination of rates of photosynthesis) and LEDs (Light-Emitting Diodes of high efficiencies when combined with lenses to create intense light fields.)

Lab: Exploring the Rate of Photosynthesis - The Biology …

Similarly, I had no idea at what
distance the plant would cease to photosynthesise, as the lamp was the
only source of intense light available.

Answer to What effect does the intensity of light have on the rate of photosynthesis ..

This article will examine photosynthetic efficiencies of various LEDs. Specifically, six light sources were tested for photosynthetic responses by zooxanthellae found in the stony coral (most likely of Clade C15.) The light sources include a black light (mostly UV-A produced by a fluorescent lamp), and LEDs radiating energy at peaks of 400nm (UV-A/violet), a 418nm LED (producing mostly violet with a small amount of UV-A), a blue/white LED combination peaking at white light with a peak 443nm and 457nm, a 'white' LED with a blue peak at 443nm, and red LEDs producing maximal light at 631nm and 657nm. All tests were performed when light intensity was at sub-saturating levels. Evidence suggests absorption by carotenoids is responsible for lessened photosynthetic efficiencies at 450 nm and 470 nm.

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Remove several leaves from around the cut end of the stem


Photosynthesis Science Fair Projects and Experiments

A) sunlight concentration B) temperature C) chlorophyll concentration D) carbon dioxide availability Effects of the variables and there concentrations: The amount of sunlight will decide the rate of photosynthesis as there will be a an increased rate of photosynthesis due to the increased availability of photons of light....

Photosynthetic Efficiencies of LEDs: Results of Short …



Variables

Input - Light intensityis to be varied by increasing and decreasing
the distance from the light source to the plant

Output - The rate of photosynthesisis to be measured by counting the
bubbles of oxygen produced by the plant every two minutes, and
therefore finding the rate of photosynthesis

Control - The amount of water available to the Elodea will stay the
same level in the 400 cm3 beaker.

ap sample lab 12 dissolved oxygen - Biology Junction

Although the preponderance of available experimental evidence indicates that stationary magnetic fields with intensities up to 2 T exert little influence on cell growth properties, there are potential mechanisms, discussed by Tenforde (1985b), by means of which effects might occur.

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