Question

The most effective wavelength of the light participate in the photosynthesis:-
A.450-520 nm
B.700-760 nm
C.660-700 nm
D.520-560 nm

Answer 1

Hint: Light is the most efficient and important thing for the process of photosynthesis, without light the process of photosynthesis can’t proceed.
Plants mainly use the light of blue and red colour wavelengths.

Complete step by step answer:
1 :- Light is the most important means for the process of photosynthesis. Photosynthesis is defined as the process of making food by using atmospheric carbon dioxide, water, and minerals in the presence of sunlight.
2 :- Chlorophyll undergoes the process of fixation of atmospheric carbon dioxide in the presence of sunlight.
3 :- When the low intensity light falls on the surface the amount of carbon dioxide fixed will also be low but then it gradually does not increase with increase in the intensity of the light.
4 :- Plants undergo the process of photosynthesis in the 400-700 nm range of the light. This is the most suitable light range for the plants.
5 :- Colour wise we can see that the process is most rapid in the blue and red colour wavelengths of the visible white light that falls on the surface.
6 :- Blue light have wavelengths of 425-450 nm and red light have 600 – 700 nm of range.

So here option C is correct.

Note:
Among these two red lights have the most suitable energy that is absorbed by the chlorophyll of the plants so that the electron present in the chlorophyll gets this energy and gets excited to the higher energy level so that the process of photosynthesis is initiated.
Also blue and red light provide a better environment to the plants to grow well.