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>
Answer:
<h2>Hello, Hope this can help you </h2>
Explanation:
The golden ratio is a classical, organic proportion that exists within nature. It can be easily identified within the spiral architecture of a shell, the pattern of the seeds in a sunflower or in the tip of a bourgeoning fernshoot, to give a few examples.
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First examine with your eyes and if evaluated safe next you use touch. i dont suggest sniffing rocks though.
