Question

The wavelength of light most absorbed during photosynthesis is (a) 700 nm (b) 660 nm (c) 550 nm (d) 400 nm

Answer 1

"     The wavelength of light most absorbed during photosynthesis is (b) 660 nm.

The most abundant pigment that is found in the chloroplasts is chlorophyll a.

Chlorophyll a absorbs wavelengths 430 nm and 660 nm. Among these two wavelengths, 660 nm belongs to the red region, that is, the lower energy spectrum.

   Plants mostly harvest this range of energy due to evolutionary processes.

Red light has the highest penetration power and thus is available in abundance for the aquatic plants.

Considering the idea that terrestrial plants evolved from aquatic plants, they retained the trait to use red light as energy source to ensure maximum availability of the same.

"

Answer 2

Dear Student,

◆ Answer - (b)

The wavelength of light most absorbed during photosynthesis is 660 nm.

● Explaination -

Chlorophylls absorb maximum light between the wavelength of 450-475 nm and 650-675 nm.

◆ Extra information -

• Chlorophyll is the green-colored pigment which absorbs light for photosynthesis in plants.
• It is considered to be primary pigment and is available in two forms chlorophyll a & chlorophyll b.
• Some other imp pigments include carotenoids, anthocyanins, xanthophylls, etc.

Thanks dear. Hope this helps you..