Assertion :- There is not a complete one-to-o | vedclass

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(D) The absorption spectrum of chlorophyll $a$ shows the wavelengths of light absorbed by the pigment. The action spectrum of photosynthesis shows the

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Assertion and reason both are true and reason is the correct explanation of the assertion

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(D) The absorption spectrum of chlorophyll $a$ shows the wavelengths of light absorbed by the pigment. The action spectrum of photosynthesis shows the rate of photosynthesis at different wavelengths of light. While the peaks of the action spectrum and the absorption spectrum of chlorophyll $a$ coincide (showing that chlorophyll $a$ is the main pigment),the overlap is not complete. This is because other accessory pigments (like chlorophyll $b$,xanthophylls,and carotenoids) also absorb light at other wavelengths and transfer the energy to chlorophyll $a$,thereby contributing to photosynthesis. Thus,the assertion is true. The reason correctly explains that while blue and red regions are most effective,photosynthesis occurs at other wavelengths as well due to the involvement of accessory pigments. Therefore,both are true and the reason is the correct explanation.

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