1.

Draw a ray diagram of formationof images by the convex lens when object placed between1.Infinity, 2. beyond 2F1

Answer»

Solution :(i)RAY diagram for object placed between F and 2F

(II)`[OH^-]=1xx10^(-11)` m
`pOH=-log_10[OH^-]=-log_10 [10^(-11)]`
`=-[-11xxlog_10 10]`
=-(-11)=11
pH+pOH =14
pH=14-pOH
pH=14-11=3


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