Question

Which pigment absorbs the red and farred light

Answer 1

Phytochromes are characterised by a red/far-red photochromicity.Photochromic pigments change their "colour" (spectral absorbance properties) upon light absorption.

Answer 2

Phytochromes are characterised by a red/far-red photochromicity.
Photochromic pigments change their "colour" (spectral absorbance properties) upon light absorption. In the case of phytochrome the ground state is Pr, the r indicating that it absorbs red light particularly strongly.