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080 effects of wavelengths of light on photosynthesis

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Photosynthesis is performed by green plants using carbon dioxide and water in the presence of sunlight to produce sugar and oxygen. The quality (wavelength) of light can have an influence on the rate of photosynthesis.

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080 effects of wavelengths of light on photosynthesis

  1. 1. 080 EFFECT OF WAVELENGTHS OF LIGHT ON PHOTOSYNTHESIS Photosynthesis is performed by green plants using carbon dioxide and water in the presence of sunlight to produce sugar and oxygen. The quality (wavelength) of light can have an influence on the rate of photosynthesis. MATERIALS REQUIRED Beaker, Funnel, Test tube, Water, Razor blade, cellotape (masking tape), Table lamp, Coloured (red, yellow, green & Blue) cellophane paper (glass paper) Any small submerged aquatic plant preferably Hydrilla. Funnel Test tube Hydrilla water Table lamp Razor Blade cellotape
  2. 2. Air bubbles Hydrilla Transparent cellophane sheets as colour filters Blue green yellow red colourless as control
  3. 3. Fill two-third of a beaker with water. Place the Hydrilla in the beaker with an inverted funnel over it and place a test tube in an inverted position so that it covers the stem of the funnel. Keep the set-up in a closed room near a table lamp. The quality of light coming from table lamp should vary using different cellophane transparent papers. Care should be taken that no other source of light should fall on the set up. Photosynthesis will soon begin and the oxygen released during the photosynthesis process can be seen in the form of bubbles rising up in the funnel stem. Note the time taken for the first bubble to be released as well record the number of bubbles released under each coloured filter for a period of 20 minutes. Count and record the number of bubbles released per minute in each case. Discuss the variation observed under each case.

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