B) herman von helmholtz
The trichromatic color theory<span> began in the 18th century, when </span>Thomas Young<span> proposed that color vision was a result of three different </span>photoreceptor cells<span>. </span>Hermann von Helmholtz<span> later expanded on Young's ideas using color-matching experiments which showed that people with normal vision needed three wavelengths to create the normal range of colors. Physiological evidence for trichromatic theory was later given by </span>Gunnar Svaetichin<span> (1956).</span>
Hello there.
<span>
Jennifer is working in a hot kitchen and doesn't want to become dehydrated. she grabs a liquid measuring cup, fills it with water and ice, and brings it back to her work station to drink while she is working. what about this practice is incorrect?
</span>
the use of the liquid measuring cup for drinking.
How is sound different from music?
Music has notes?
