the correct lens formula is 1/f = 1/v+1/u so why have you rearranged as 1/v - 1/u = 1/f? I do not understand why 25cm is negative, please draw this on a lens diagram to help aid my understanding of when to use sign conventions
the correct lens formula is 1/f = 1/v+1/u so why have you rearranged as 1/v - 1/u = 1/f? I do not understand why 25cm is negative, please draw this on a lens diagram to help aid my understanding of when to use sign conventions
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the correct lens formula is 1/f = 1/v+1/u so why have you rearranged as 1/v - 1/u = 1/f?
I do not understand why 25cm is negative, please draw this on a lens diagram to help aid my understanding of when to use sign conventions
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