We can see colors as a result of the interaction between light and matter.Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). The main source of light on Earth is the Sun. We can see also the visible colors of the light by rainbow which is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
Take a look into the attached video for more information about light and its interaction with matter to obtain colors, then answer the following question below.
Could the compound p-amino-o-Cresol be used as a hair dye?
5 People tried to answer this question
Very Good :-)
The compound p-amino-o-Cresol alone contributes little in the way of color. It has to be reacted with p-aminophenols in the presence of H2O2 by coupling reaction to produce dye molecules. The dye molecules contain multiple conjugated double bonds system, which give them the ability to absorb some wavelengths of light at the visible region of the spectrum more than others (TYPE A interaction, between light and matter). By this way, we can produce the desired end strong color.
I would like to thank you for the interesting Challenge you gave in this question.
The scientific background and the animation are clear and understandable.
I think that your question is between understanding to applying level.
Some comments and recommendations:
1) To give some information about pigments and what is p-amino-o-Cresol.
2) To give more detailed feedback for the wrong answer.
3) The answers are very closed and need a deep knowledge in chemistry
And Because of my lack of knowledge I tried to learn about p-amino-o-Cresol in the internet and I find this information: "6-Amino-m-Cresol, 6-Amino-o-Cresol… are crystals that range in color from beige and reddish-brown to brown. These ingredients are used in the formulation of semi-permanent and permanent hair dyes, colors, and tints " (see site http://www.cosmeticsinfo.org/ingredient/amino-cresol-hair-dye-ingredients), the right answer you gave is " No, The compound has to be reacted with other chemical reagents in order to get a product which has multiple conjugated double bonds"- please check that.
I realy enjoyed reading your question it's really an interesting subject, and the video was clear and simple,I learned alot of new information. but still because I am not from the chemestry field it was hard for me to understand few things like what is the p-amino-o- cresol , so I couldn't answer the question correctly.
I think you should explain more and give mor information about basics, couse its really high level question that needs more knowledge in chemestry which is good.