This EEI is aimed to examine the response of coloured incandescent light bulbs which emitted different wavelengths of light on Tagetes erecta seedlings. The seedlings were exposed to red, orange, yellow, green and blue and sunlight The seedlings were placed in an open card board box for with the coloured light for 26 days. After the end of the growth period, the results partly agreed to the hypothesis but there were significant errors which may have led to this occurrence. It showed healthy growth and development in red and sunlight and unhealthy in green light which agreed but the blue light received the second poorest growth and development. It conclusion, the hypothesis should theoretically be correct but the errors in the experiment caused altered results.
This experiment investigates the different rates at which Tagetes minuta (marigold) grow with the use of a coloured lights to determine the most suitable coloured light for the best quality of growth of marigold. “Photosynthesis is the process by which plants use the energy from sunlight to produce sugar] which is the "fuel" used by plants”. The conversion of unusable sunlight energy into usable chemical energy is linked with the actions of the green pigment chlorophyll.” (M.J. Farabee 2010).The “fuel” is stored in the form of glucose (sugar). Carbon dioxide, water, and sunlight are used to produce glucose, oxygen, and water. The process of photosynthesis can be summarized into the following chemical