A) \[1600\,c{{m}^{2}}\]
B) \[400\,c{{m}^{2}}\]
C) \[800\,c{{m}^{2}}\]
D) \[200\,c{{m}^{2}}\]
Correct Answer: A
Solution :
Linear magnification \[=4\] Areal magnification \[\text{ }\!\!~\!\!\text{ =}\,{{\text{(linear magnification)}}^{\text{2}}}\] \[\text{=}\,{{\text{(4)}}^{2}}=16\] Therefore, area of magnified film on the screen = areal magnification \[\times \] area \[=16\times \,\,100\] \[=1600\,c{{m}^{2}}\]
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