In the given figure, the focal length of the two mirrors M−1 and M−2 for the given incident rays are f1 and f2 respectively, then
A
f1=+ve,f2=+ve
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B
f1=−ve,f2=−ve
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C
f1=+ve,f2=−ve
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D
f1=−ve,f2=+ve
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Solution
The correct option is Cf1=+ve,f2=−ve The direction of incident ray is taken as positive.
Also all the distances are measured from pole.
So, f1=+ve,f2=−ve