We know that the objects are made up of atoms. We also know that we cannot see atoms with the help of light as the wavelength of light is too big in comparison to atom. So, my question is then: how can we see objects with the help of light if we cannot see atoms?
[Physics] How to see objects with the help of light if we cannot see atoms
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Best Answer
As explained in a related previous thread, the human eye cannot resolve atoms (in the sense that visible light is too coarse to distinguish one atom from its neighbours in solids and liquids), but that does not mean that we cannot perceive the light that they emit.
The light emitted by each atom is generally quite faint (probably just under the detection threshold for human vision), but if the atom is emitting (or reflecting, or scattering) photons, there's a nonzero probability that the cells in the human eye will detect it.
If you then put a bunch of atoms together, they will emit more photons, and the probability that the cells in the eye will detect it increases. Put enough atoms together, and it becomes certain that the eye will detect the signal. We cannot tell with certainty where the signal comes from to any accuracy better than the wavelength of light, but that does not mean we cannot detect the signal.