Question

Where should an object be place from a converging lens of focal length 20cm, so as to obtain a real magnified image?
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Answer 1

$\huge{\bf{\green{\mathfrak{Question:-}}}}$

• Where should an object be placed from a converging lens of focal length 20cm, so as to obtain a real magnified image.

$\huge {\bf{\orange{\mathfrak{Answer:-}}}}$

$\bullet{\leadsto} \: \textsf{According to the question,}$

$\bullet{\leadsto} \: \textsf{\underline{Converging lens means Convex lens.}}$

$\bullet{\leadsto} \: \textsf{To obtain a real and magnified image,}$

$\bullet{\leadsto} \: \textsf{\underline{We have to place it between F and C.}}$

$\bullet{\leadsto} \: \textsf{F = 20 cm.}$

$\bullet{\leadsto} \: \textsf{C = ?}$

$\bullet{\leadsto} \: \sf C \: = \: 2f$

$\bullet{\leadsto} \: \sf C \: = \: 2 \: * \: 20$

$\bullet{\leadsto} \: \boxed{\sf C \: = \: 40 \: cm.}$

$\bullet{\leadsto} \: \textsf{In between F and C means,}$

$\bullet{\leadsto} \:$The object must be placed between 20 cm (F) and 40 cm (C).

$\huge{\bf{\purple{\mathfrak{Note :-}}}}$

$\bullet{\leadsto} \: \boxed{\textsf{See Attachment}}$

$\bullet \: \textsf{Then,}$

$\large\bullet \:\boxed{ \textsf{Characteristics of Image :-}}$

$\sf{Object \: placed \: :- \: Between \: F_{2} \: and \: C_{2}.}$

$\textsf{It is a real image.}$

$\textsf{It is inverted.}$

$\sf{Image \: formed \: :-\: Beyond \: C_{1}.}$

$\textsf{Object size < Image size i.e it is magnified.}$