Why do we see objects only when light falls on them?
Generally we would refer to it as reflection taking place or some wavelength being absorbed, the rest of which are not absorbed are sent to our eye to see the light. But consider this
Photon is sort of an electron vibrating at a frequency were the energy of oscillation becomes visible or light is obtained.
Now, when this photon strikes a surface it is bound to share some energy with the electron in the surface thus forcing it to oscillate. If the energy is released in the visible region then we may able to see it
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