what do you think you know about physics, physics is the study of matter under the effect of energy, but does this includes solid states bodies, atoms at ground states, object at microscopic size or object moving faster than light? these and more is what prompt me to ask again what is physics?
what is the wavelength of the longest wavelength light that can be seen with the human eye?
the longest
wavelength of em waves that can be seen with an unaided human eye is 400nm, the
longest wavelength in the visible light spectrum. That is the red light.
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