Sir we know chlorophyll a has peak on 429 and 660 nm then why in ans it is give that - Biology - Environmental Issues

Question

Sir we know chlorophyll a has peak on 429 and 660 nm then why in
ans it is give that it is between 400 to 500nm it should be between
500 to 600nm?????????

Anchal · Accepted Answer

Dear Student
The option 4 is correct for the explanation you
can check absorption spectrum:

280 ~ 315nm has small effect of plant morphology and
physiological processes
315 ~ 400nnm absorption rate is small, impact the photoperiod,
prevent stem elongation
400 ~ 520nm (blue) Absorption ratio of of chlorophyll
and carotenoid in this light is maximum, it has the greatest impact
on photosynthesis
520 ~ 610nm absorption rate is not high
610 ~ 720nm (red) low absorption rate It has a significant
effect on photosynthesis and light cycle effect of chlorophyll
720 ~ 1000nm Low absorption rate, stimulate cell elongation,
impact of flowering and seed germination
1000nm converted into heat

Regards

Sir we know chlorophyll a has peak on 429 and 660 nm then why in ans it is give that it is between 400 to 500nm it should be between 500 to 600nm?????????