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  • In the shown in figure, find the position and size of image, for the situation.                        <img src="http

In the shown in figure, find the position and size of image, for the situation.

                       

Option: 1

v=-60 cm, h_2=2mm


Option: 2

v=-60 cm, h_2=4mm


Option: 3

v=-40 cm, h_2=2cm


Option: 4

v=-30 cm, h_2=2mm


Answers (1)

best_answer

 

 

 

For refraction near point A, u=-30 cm ; R=-20 cm ;\mu_{1}=2, \mu_{2}=1

\begin{array}{l}{\text { Applying refraction formula } \frac{\mu_{2}}{v}-\frac{\mu_{1}}{u}=\frac{\mu_{2}-\mu_{1}}{R}} \\ \\ {\frac{1}{v}-\frac{2}{-30}=\frac{1-2}{-20}} \\ {v=-60 \mathrm{cm}} \\ \\ {\qquad m=\frac{h_{2}}{h_{1}}=\frac{\mu_{1} v}{\mu_{2} u}=\frac{2(-60)}{1(-30)}=4} \\ \\ {\Rightarrow \quad h_{2}=4 \mathrm{mm}}\end{array}

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