The primary function of light absorption by photosystems i and ii is to produce .

therefore, the efficiency is:

It's because 3 if it was 10 it wouldn't look right do it goes up to 4d

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.