Light interacts with wood through it's particle nature.
Explanation:
LIGHT has dual nature properties . It behaves with waves as a wave and with particles as a particle .
Light can interact with matter in three ways:absorption, transmission, and reflection.
ABSORPTION :
When a light wave with a identical frequency to an electron’s natural frequency “impinges” upon an atom, <em>the electrons will begin to vibrate</em> as a result .
The electrons will absorb the light wave and turn it into a vibrational motion . The electrons, in turn, bump up against neighboring atoms, which<em> changes the vibrations intothermal energy</em> .
This <em>thermal energy is not turned back into light energy, thus that particular light wave never leaves the object again. This is ABSORPTION.
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2. REFLECTION :
This occurs when the <em>frequency of the incoming light wave </em><em>does not match</em><em> that of the electrons’ natural frequency. </em>
If the object is opaque , the electron vibrations are not “passed down” like during absorption.
Rather, <em>the surface-level electrons vibrate briefly before emitting that wave back out (as light). This is REFLECTION.
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3. TRANSMISSION :
Transmission works along the same lines as reflection, except it involves transparent or semi-transparent objects.
The atoms taken in the wave, vibrate briefly (but at a small amplitude) , <em>transfer the vibrations throughout the body </em><em>of the material, and then </em><em>re-emit the wave as light out the other end.</em><em> This is TRANSMISSION.</em>
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