Sir i did not understand this ques pl z explain step by step

Last updated: 6/8/2023

Sir i did not understand this ques pl z explain step by step how do we de al with such types of questions An arrangement for YDSE is shown in figure S is a light source then find the position of central maxima from point O on screen B f 20 cm D 80 cm 1m Screen A S 1 mm 20 cm lo 3 mm 5 mm below O O Screen B