A) 70 cm from the concave lens
B) 60 cm from the convex lens
C) 60 cm from the concave lens
D) 70 cm from the convex lens
Correct Answer: D
Solution :
Ans. [BONUS] \[{{f}_{1}}=+300cm\] \[f=-120cm\] Event .1 Refraction from convex lens. F = + 30 \[\frac{1}{v}-\frac{1}{-60}=\frac{1}{30}\] \[v=+60cm\] Event .2 Refraction from concave lens \[\frac{1}{v}-\frac{1}{+40}=\frac{1}{-120}\] \[v=+60cm\] Event .3 Refraction from plane mirror Event .4 Refraction from concave lens \[\frac{1}{v}-\frac{1}{-40}=\frac{1}{-120}\] \[v=-30\] Event .5 Refraction from convex lens \[\frac{1}{v}-\frac{1}{-50}=\frac{1}{30};v=+75cm\]You need to login to perform this action.
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