why is gold and silver not absorbed
Answers
Answer:
Let's begin by reminding ourselves that white light is composed of all the different colors of light put together: red, orange, yellow, green, blue, indigo, violet, and every color in between. When sunlight reaches the Earth it is composed of all of these colors; in other words, sunlight is white light. When the light hits an object, the object can either absorb the light or not absorb the light. In general, the absorption of different colors is not equal, meaning that an object will absorb specific colors of light and not absorb others.
When sunlight interacts with a piece of gold, the gold tends to absorb blue light and not absorb green and red light; instead, the green and red light is partially reflected. What we as humans see is the combination of the reflected green and red light, which gives the classic golden yellow color!
In other metals, like aluminum, the colors of white light are almost equally absorbed and reflected and thus what we see is a silvery, white-ish material!
Hope this helps you understand the basic premise!
Bonus question: Using this same concept, what color of light do most plants absorb and not absorb?
Bonus answer: Most plants are green and thus they tend to absorb all the colors but green and not absorb green (i.e. the green color is reflected, which is what we see!)
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