Objects Absorb & Reflect Light: How Does It Work?

In summary, objects absorb certain wavelengths and reflect others, which gives them their color. This happens because certain substances absorb specific wavelengths of light, which excites their electrons to a higher energy level. When the electrons return to their original energy level, they can release the same color they absorbed. However, not all absorbed photons will be re-emitted at the same wavelength, as there are other factors such as collisions that can de-excite the molecules. Light reflects off of objects through a process of bouncing back.
  • #1
B4ssHunter
178
4
if objects absorb certain wavelengths and reflect some * which give us its colour*
how does this actually happen ?
if a certain substance absorbs red colour because it equals the amount of energy * quanta * needed to excite its electron to the next energy level , then shouldn't the electron get back to its former energy level releasing the same colour it absorbed ? shouldn't this mean that objects that absorbs red colour emit red colour ? and also how does light reflect off something ? does it just bounce back ?
 
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  • #2
Not every photon absorbed will be re-emitted at the same wavelength. An excited molecule will take various decay paths with some probability, aka branching factors. Also, the excited molecule can be de-excited by collisions or other processes.
 

1. What is the difference between absorption and reflection of light?

Absorption of light occurs when an object takes in some or all of the light that shines on it, while reflection occurs when an object bounces off light rays in different directions.

2. How do objects absorb light?

Objects absorb light when the energy from the light is converted into heat, which causes the atoms or molecules in the object to vibrate and increase in temperature.

3. What determines the color of an object?

The color of an object is determined by the wavelengths of light that are reflected or absorbed by its surface. Objects that reflect all wavelengths of light appear white, while objects that absorb all wavelengths appear black.

4. How does the surface of an object affect its ability to absorb and reflect light?

The surface of an object can affect its ability to absorb and reflect light in a few ways. A smooth surface reflects more light, making the object appear shinier, while a rough surface absorbs more light, making the object appear duller. Additionally, the color of the surface can also affect how much light is absorbed or reflected.

5. Can objects only absorb or reflect light, or can they do both?

Objects can do both absorb and reflect light. The amount of light that is absorbed and reflected depends on the material and surface of the object, as well as the wavelengths of light that are present. Some objects may absorb more light at certain wavelengths and reflect more light at others, giving them a specific color.

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