How is it that peaks representing different hydrogens in an organic molecule appear at different locations in an NMR spectrum?

NMR spectroscopy is the nuclear magnetic resonance spectroscopy. Proton NMR is the important for analyzing a organic molecule. Different hydrogen molecules absorb the energy of the different wavelength depending upon the different bonding environment and hence, appears at different location.

The relative height of peak corresponds roughly to the strength of the absorption by each different hydrogen molecule. The hydrogen atoms in the organic molecule generally appear on the left of the reference peak (i. e. TMS peak) because they absorb energy radiation of higher energy than the hydrogens of tetramethylsilane (TMS).