The effect of light intensity on the rate ..

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.

Effects of Light Intensity on the Rate of Photosynthesis

Aim: We will be trying to see if light intensity has an effect on the rate of photosynthsis.

Effect of Light on Photosynthesis by Fourier Education - issuu



My reasons for believing my results are reliable & accurate are
firstly, they agree with the theory behind the rate of photosynthesis
when light intensity is increased, secondly the result which I gained
compared accurately to my prediction, which was well thought out
before it was made, and finally the results I gained for my final
experiment differed so much to the results of my preliminary procedure
which was very inaccurate.

Effect of Light on Photosynthesis, Author ..

At a point (which was not
displayed on my graph, so logically this point is higher than the
highest light intensity I provided the pond weed with) the rate of
photosynthesis will stay steady , it will increase no further (see
diagram e).

Prediction:I predict that raising the light intensity will increase the rate of photosynthesis.

BBC - GCSE Bitesize: Factors affecting photosynthesis

I can say that the
increase in distance thus making the light intensity stronger
increased the rate of photosynthesis and when further away made the
rate of photosynthesis almost come to its limiting factor the
straitening of the graph.

Does Light Intensity increase the Rate of Photosynthesis

A limiting factor is a factor that controls a process. Light intensity, temperature and carbon dioxide concentration are all factors which can control the rate of photosynthesis. Usually, only one of these factors will be the limiting factor in a plant at a certain time. This is the factor which is the furthest from its optimum level at a particular point in time. If we change the limiting factor the rate of photosynthesis will change but changes to the other factors will have no effect on the rate. If the levels of the limiting factor increase so that this factor is no longer the furthest from its optimum level, the limiting factor will change to the factor which is at that point in time, the furthest from its optimum level. For example, at night the limiting factor is likely to be the light intensity as this will be the furthest from its optimum level. During the day, the limiting factor is likely to switch to the temperature or the carbon dioxide concentration as the light intensity increases.

Rate of photosynthesis versus light intensity with different CO2/NaHCO3 concentrations (2 factors)

As the intensity is increased the rate also increases

Farmers can use their knowledge of these limiting factors to increase crop growth in greenhouses. They may use artificial light so that photosynthesis can continue beyond daylight hours, or in a higher-than-normal light intensity. The use of paraffin lamps inside a greenhouse increases the rate of photosynthesis because the burning paraffin produces carbon dioxide, and heat too.

Rate of photosynthesis versus CO2/NaHCO3 concentrations at light intensities (2 factors)

IB Biology Notes - 8.2 Photosynthesis

The action spectrum of photosynthesis is a graph showing the rate of photosynthesis for each wavelength of light. The rate of photosynthesis will not be the same for every wavelength of light. The rate of photosynthesis is the least with green-yellow light (525 nm-625 nm). Red-orange light (625nm-700nm) shows a good rate of photosynthesis however the best rate of photosynthesis is seen with violet-blue light (400nm-525nm).

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

Light intensity is a factor in ..

Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase.