enter image description here

Here is the link to the puzzle

  • $\begingroup$ Does v means frequency here? $\endgroup$
    – Netham
    Dec 12, 2016 at 13:35
  • $\begingroup$ That is the part of the puzzle ;) $\endgroup$
    – alDiablo
    Dec 12, 2016 at 13:43

1 Answer 1


It is


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 $2\times4\times f \times 4.13 \times 10^{-15}\tt{\ eV}$, which can also be written as ~$8f$ or $8v$ in the scientific notation.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.