What is absorption spectrum?

From which source a continuous emission spectrum and a line absorption spectrum are simultaneously obtained

Write a note on absorption spectrum.

Explain in detail about absorption spectrum and action spectrum of light.

Which of the following statements about absorption spectrum is correct ?

Which of the following statements about absorption spectrum is correct ?

In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the followings: How can we derive an absorption spectrum for any susbtance?

In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a, answer the followings: If chlorophyll-a is responsible for light reaction of photosynthesis, why do the action spectrum and absorption spectrum not overlap?