In optical arrangement with graduated scale, when glass block is tilte – McqOptions

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1.	In optical arrangement with graduated scale, when glass block is tilted by i then incident ray from scale deviates from straight line path. What is the displacement h ? ( w is the glass width)
A.	sin(i-r)/wcosr
B.	w cos(i-r)/sinr
C.	w sin(i-r)/cosr
D.	cos(i-r)/wsinr
Answer» D. cos(i-r)/wsinr

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