Question

$I.$ Find out the wavelength (colour of light) at which chlorophyll $‘a^{\prime }$ shows the maximum absorption?
$II.$ Does chlorophyll-a show another absorption peak at any other wavelengths too? If yes, which one?

Answer 1

Introduction:
The representation of the different wavelengths of light absorbed by the different pigments (chlorophyll a, chlorophyll b, xanthophyll and carotenoids) is called absorption spectrum.
The representation of wavelength at which photosynthesis occurs is called the action spectrum.

I.Chlorophyll a :
Chlorophyll a shows maximum absorption of light with wavelength of $430-470nm$ (blue).


II.Chlorophyll a :
Other than blue light, chlorophyll also shows a maximum absorption of light with wavelength $660-670nm$ (red).