Question

When an electron jump from the fourth orbit to the second orbit, one can get :​

Answer 1

$\huge\underbrace\mathfrak\purple{Answer}$

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when electron jump from Higher orbit to lower orbit the energy is lost . while when electron jump from lower orbit to the higher then the energy is gained by the electron .

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here according to question the electron is jumping from 4 orbit to 2 orbit that means it is jumping from higher to lower orbit and therefore the energy will be lossed by the electron .

$\huge\mathrm\pink{I\:hope\:it\: helps\:you.}$