Answer:

The ionic state of iron changes between ferrous and ferric, which leads to electronic transitions of the porphyric ring, thus changing its optical characteristics (as light is incident on this material). the skin tone that decides how much blue and red light is absorbed and/or emitted.

Explanation:

Explanation:

Hey there!

Light sometimes does in fact propagate, even if you keep your hands in its path, but the only catch is that our eyes cannot see these, i.e these light's wavelength lie out of the range of visible spectrum.

But now we might think why visible spectrum doesn't diffract( or bend) about our hand. The answer to this lies in the fact that for diffraction to take place, the width of the slit should me comparable with wavelength of the light.

This is why, visible spectrum is not propagating through our hand

Also sound has wavelength much greater than that of light hence it is able to diffract

The wavelength of of audible sounds range from 17m to 17mm whereas wavelength of visible spectrum is 450nm-700nm!!

Hope this answer helped you ✌️