* Added Photoelectric effect equation
Photoelectric effect is one of the demonstration of quanta of energy.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* fixed doctest
Co-authored-by: Rohan Anand <96521078+rohan472000@users.noreply.github.com>
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Rohan Anand <96521078+rohan472000@users.noreply.github.com>
