Question

The curve showing the amount of light absorbed at each wavelength is called as
(a) Action spectrum
(b) Absorption spectrum
(c) Quantum yield
(d) Quantum requirement

Answer 1

Hint: Photosynthetic pigments occur in the plant cells' chloroplast. These pigments absorb light from a given wavelength and use this light for photosynthesis. The curve depicting the amount of light absorbed at each wavelength can be recorded through an analysis of the reactions and the pigments involved.

Complete answer:
The curve or graph showing the amount of light that the pigment absorbs at each wavelength is known as the spectrum of absorption. For any pigment this is characteristic. It is analyzed using a spectrophotometer.

The action spectrum shows the overall photosynthesis rate at each luminous wavelength. A spectrum of action is a graph of the biological efficacy rate plotted against light wavelengths.
A fluorophore's quantum yield is defined as the proportion of the number of photons emitted, divided by the number of photons absorbed.
The quantity of light absorbed needed for one molecule's transformation is the quantum requirement. It's the Quantum yield reverse.
So, the correct answer is, ‘Absorption spectrum’.

Note: Photosynthetic organisms contain light-absorbing chemicals, called pigments, which only absorb certain visible light wavelengths while reflecting others. Due to its accuracy and quantitative nature, absorption spectroscopy is of use in chemical analysis. The precision of the absorption spectra makes it possible to differentiate compounds in a mixture from one another, making absorption spectroscopy useful in a wide range of applications. Infrared gas analyzers, for example, can be used to classify contaminants in the environment, separating the pollutant from nitrogen, oxygen, water, and other predicted constituents.