Write an essay on if the colour of blood was black then what will happen
Answers
Explanation:
Colour is perceived by human eyes when different wavelengths composing white light are selectively interfered by matter.1c Humans can see colours due to the cones present mainly in the middle of our retina and a few on the periphery.1a Each eye contains six million cones with pigment that is sensitive to either red, green or blue.1b Sensation of light and visual sharpness are created through transmission of high levels of light intensity.1a Colour with wavelengths between that of primary colours stimulates a combination of cones. As a result, all colours can be detected in the visible spectrum which is about 400 to 700 nanometers.1b,1c One interesting fact about our eyes is that they can perceive more variations in warmer colours than cooler ones as almost two-third of the cones process the longer light wavelength.1a The picture below shows the respective wavelength each cone is sensitive to.
Both scientific and psychological effects of colour are suggested by many top scientists or researchers. The study of psychological effect of colour is defined as chromology.1d Maryland study by University of Loyola stated that colour increases brand recognition up to 80 percent.1g Improvement of readership, learning and comprehension with the help of colours is also noted.3a,3b Another interesting observation is recorded by Paul E. Boccumini, director of clinical services of San Bernardino County Probation Department in California. Children under detention are observed to cool down within 10 minutes after they are put in a room of bubble gum pink.4a Meanwhile, scientific application of colour in medical field is the usage of lights in full spectrum to cure depression for Seasonal Affective Disorder especially during winter months when the people are deprived of light.1e,2a
Hence, the ancient and once dishonoured field of chromotherapy is regenerated. Red is used to stimulate the body and increase circulation while yellow is thought to play a role in body purification. Blue soothes illness.1f
This experiment was carried out to investigate the true effect of colours on blood pressure and whether different colours affect us differently. If colours are found to really affect our body differently, then more attention should be put into colour consideration in fields such as marketing, education, art, and medicine. A person of high blood pressure should be more aware of the colour of their living and working environment. Colour surrounds us all the time. If we can fully understand and use it, it will undoubtedly influence and change our everyday life.
Statistical analysis showed that there is a significant difference in the effect of different colours on blood pressure. Red and yellow increases blood pressure, blue decreases blood pressure while green and black have fluctuated stabilising effect. This proved that it the effects of colours are biological and not merely due to psychological effect or experimental error.
From the table we could conclude that yellow showed greater increase in blood pressure with a higher mean and median of 11.54 and 10.50 respectively. However, it had results over a big range of data from minimum increase of +4 to a maximum increase of +29 and a highest standard deviation of 5.93 compared to other colour, which limited the creditability of the data. By plotting a box plot, we could determine that +29 is an outlier. Psychological effects that have been suggested for this colour are anger provoking and activeness.
Nevertheless, compared to yellow colour, a significant increase was also noted for red colour. But, red colour recorded shown a smaller range of data, and hence, smaller value of standard deviation, which made the data more reliable than the yellow colour. Furthermore, it was also interesting to note that the box plot of red colour was positively skewed with more people showing greater increase than the median. Red colour is more commonly associated with excitement and awareness of danger.
Blue colour, which is always linked to sadness and calmness, showed a neutral box plot with no skewing of data on the other hand. It was more concentrated with most people showed decrease between -3.00 and -7.00. Therefore, it could be concluded that blue decreases our blood pressure. The range of data is also smaller than that of yellow colour.
Green colour, a colour of stability, showed a positively screwed data of a mean of -0.17. Therefore, the effect of green is hard to be explained and might have slightly opposing effects under different circumstances. The differences and fluctuations of data could be due to cultural association and personal experience as well. Some fluctuation could be due to experimental error.