Show that in general a skew-symmetric tensor such as the spin tensor W has only one real principal value λ. Determine λ and the corresponding direction ˆn in terms of the components w1 = −W23, w2 = −W31, w3 = −W12 of the vector ˆω.

In other words, plants are the producers of the biosphere in the ecosystem. they use the process of photosynthesis to use light energy and inorganic carbon dioxide to be fixed into sugar, such that it contains stored chemical energy and is consumed by other organisms.