Why aren't plants black? 🌿

I had this topic 1-2 years ago with a teacher of my higher technical college in austria, a lonely but really smart and nice guy. He also asked me the question why are plants and trees reflecting green light back.?Then we looked up at the electromagnetic wave spectrum mainly the visible one (around 400-800nm) and asked what do you think does the plant need in order to survive and grow beside water.?. I answered at least the heat/warmth of the sun, better the infrared wavelength Region (reddish orange and above) and to make this story shorter it was an 2 hour discussion about physics with him and i really enjoyed it, thats what i want to study or maybe technical physics. We finished the green plant topic with the second factor photosynthesis this aquires mostly the most energetic wavelength of light so the short wavelength according to ( E = h*f, Energy equals frequency (1/wavelength) times Planck's Constant) so it's more likely the bluish ultraviolet light that is used for photosynthesis. With this just think of the sun's light as in the video already said it contains all wavelengths all "colours" (white..)and take away the upper wavelength and lower visible parts away look up at the electromagnetic spectrum and here you see green is in the middle, it's just doesn't need it to survive so it can be reflected. Thats what i discussed and for me it's logical. Think about it