Use concepts from the electromagnetic spectrum and the electronic nature of colo
ID: 704960 • Letter: U
Question
Use concepts from the electromagnetic spectrum and the electronic nature of color to briefly explain the following observations. look green? chlorides, such as FeClala?) and CuChla?), produce vivid colors in solution (orange and blue/green, respectively). (a) Chlorophyl the molecule that converts sunlight into energy in plants, absorbs blue and red light. Why do plants (b) All soluble Group 1 and 2 chlorides are colorless when dissolved in water, but most soluble transition metal Why are compounds such as NaCl(a?) and CaCl2laq) colorless? hint: ZnCl2faq) is also colorless. (c) Many nocturnal animals have the capability of seeing infrared light. However, very few animals can see ultraviolet light, and none can perceive light with shorter wavelengths than ultraviolet. Why haven't animals adapted to seeing light of shorter wavelengths?Explanation / Answer
a) the colour that the pigment doesnot absorb is reflected.Chlorophyll absorbs red and blue light and reflects green and that is the color that we see.Therefore plants look green.
b)Compounds such as FeCl2 have unpaired d electrons which undergo transition in presence of visible light and reflect colors however componds like NaCl donot have unpaired d electron and donot undergo any transition in visible light.
c)Some animals have the ability of seeing infrared light because the detection of body heat of their prey is highly useful to them.However there is no need for any animal to see in the shorter wavlengths than UV and hence have not adapted to it.
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