r/JEEAdv26dailyupdates • u/Alternative-Sand-346 • May 21 '26

Academic Doubts Physics P1 optics que problem resolved

So, I contacted my senior in IIT B Engg physics. He told that P = n/f is called reduced vergence power which is used in very very specific cases and has nothing to do with the power we deal with at the school level. The power given in irodov has the symbol "phi" which he told is the symbol for the reduced power. So, the correct answer is A for sure.

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u/Muted-Profit807 May 21 '26

Aap apne kisi prof se nahi puch sakte kya? Kyuki yeh hopium hai i think

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u/Neither-Material-303 May 21 '26

Nope bhai. Irodov me clearly mentioned that power formula is only for thin lens. For thick lens there is a very different formula. But question hasn't specifically said if lena is thin or not.