Consider an experiment conducted by a researcher on two subjects A and B. A and B do not communicate with each other during the experiment.

In the experiment, the researcher shines a light of a particular frequency, say X and asks participant A to mark the colour of the light in a colour palate provided by the researcher. Something like this -


The researcher notes down the what participant A has marked and asks her to name the colour. Let’s say she says it is red.

Now the researcher conducts the same experiment on participant B who does not know what participant A has said. Now if participant B also marks the colour of the light in the colour palate identical to that of participant A and names is as red, would we say that the frequency of light X gives rise to a perception in participant A and B which they both identify as the same thing?