Read the following two statements related to lens and pick the correct answer.
Read the following two statements related to lens and pick the correct answer.
a) Any ray passing along the principal axis undeviated
b) A ray passing parallel to the principal axis converge at the focus or appear to diverge from the focus.
A) only (a) is true
B) only (b) is true
C) both (a) and (b) are false
D) both (a) and (b) are true
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