A) 7.5cm
B) 22.5cm
C) 40 cm
D) 30 cm
Correct Answer: A
Solution :
Image formation by concave mirror will be as follows: Given, \[250\times {{(4)}^{0.4}}K\] \[{{\rho }_{1}}\] \[{{\rho }_{2}}\] Also \[{{v}_{1}}\] where f is focal length, v is image distance and u is object distance. \[{{v}_{2}}\] \[\frac{{{\rho }_{1}}}{{{\rho }_{2}}}=4\] \[\frac{{{V}_{1}}}{{{V}_{2}}}\] \[\frac{1}{2}\] Thus, the object should be placed at a distance 7.5 cm in front of the mirror.You need to login to perform this action.
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