# ？下の図の

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それは

Energy

The diagram and numbers refer to the Sun’s fusion reaction (our
source of energy ) and talk about energy of the two photons emitted
from the Sun in one fusion reaction
– \$2\$ refers to the mass of Deuterium so it represents
inertia
– \$4\$ refers the minimum number of Hydrogen atoms required for a
fusion to take place also called critical mass
– \$f\$ refers to frequency. Energy of a photon is directly
proportional to it’s frequency (Planck-Einstein relation), it the
cause of change in energy
– \$h\$ refers to the Planck constant. The reduced Planck constant is
the quantum of angular momentum of a Photon
– \$8v\$ refers to \$(8 times tt{frequency})\$. Energy of one photon
is \$hf\$ by Planck-Einstein relation. Energy of the two photons will
be \$2hf\$. Value of \$h\$ is \$4.13 times 10^{-15} tt{ eV}\$. Since
frequency of an emitted photon can vary, total energy emitted in
one fusion reaction is approximately \$2times4times f times 4.13
times 10^{-15}tt{ eV}\$, which can also be written as ~\$8f\$ or
\$8v\$ in the scientific notation.