Question

Red colour of ruby is due to the presence of​

Answer 1

Answer:

Chromium is the trace element that causes ruby's red, which ranges from an orangy red to a purplish red. The strength of ruby's red depends on how much chromium is present—the more chromium, the stronger the red color.

Explanation:

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Answer 2

Answer:

Chromium is the trace element that causes ruby's red, which ranges from an orangy red to a purplish red. The strength of ruby's red depends on how much chromium is present—the more chromium, the stronger the red color. Chromium can also cause fluorescence, which adds to the intensity of the red color.