So it is not hard to envision the evolution of pigments or systems of pigments that could absorb green light photons and then pass on red and blue light photons to chlorophyll. A plant possessing such a pigment system could look black, and would undeniably be a more efficient photosynthesizer than any green plant.

But evolution has not at least as far as I know stumbled on to this trick. And the reason could simply be because it has never been necessary. There are plenty of red and blue photons around, and there is no need to absorb those middle wavelengths, and manufacturing those other pigments is costly and perhaps isn’t worth it.

You really shouldn’t take a throwaway joke that seriously. It’s not good for the blood pressure.

“Why are plants green? According to Fred Hoyle, green plants on Earth originated from unicellular photosynthetic organisms that came aboard comets. …”

Q1. Was there any scientific proof that unicellular organisms can ride a comet and fall on earth and evolved to become plants?

Q2. are you (in 147) stating those as it is or as a science fiction joke? Fred Hoyle was also a science fiction writer.

Wavelength and color have almost nothing to do with one another. For example, while some pure colors happen to correspond to particular wavelengths, but other pure colors cannot be produced by any light of a single wavelength. This was already known to Newton and Helmholtz. It’s really a shame that many physicists still don’t know the first thing about color.

Beautiful

I believe that someone answered this question earlier in the comments!! You should search and read it, I found it very interesting!

According to Fred Hoyle, green plants on Earth originated from unicellular
photosynthetic organisms that came aboard comets.

These unicellular photosynthetic organisms were born in giant molecular clods where the
light from neighboring stars was reddened by the intervening dust.

They needed a green photosynthetic pigment – chlorophyll , to absorb the red light optimally .

Present day plants descended from these unicellular plants
that came from space.

Some plants developed photosynthetic pigments of other colors, but
chlorophyll had a head start.

Whether the sun is white or yellow is actually not really a well-defined question. So much of colour perception is in our heads that it doesn’t make sense to ask what colour an object “really” is. For example, a piece of “black” asphalt in dazzling sunlight might be sending exactly the same spectrum (and amount) of light into your eyes as a piece of white paper in dimmer light, but your eyes will correctly perceive the one as black and the other as white using context. Colour perception is even more complicated, as anyone who’s had to fool with the white balance controls on a digital camera should know. Optical illusions serve to make the brain’s interpolation obvious, but it goes on all the time.

In particular, the claim that snow would look yellow if the sun were yellow is just plain wrong: white paper looks just as white under the Sun as it does under yellow incandescent bulbs or under ugly industrial fluorescents. The Sun usually looks yellow when you look at it, and there isn’t really a more absolute sense in which you can say it’s “really” white.

Colour is a much more complicated business than the usual mumbo-jumbo about additive and subtractive primary colours that most of us got in school.