question_answer

Sudha needs a lens of power \[-\,\,4.6\]diopters for correcting her distant vision and she needs \[+\,\,1.3\] diopters for correcting her near vision. What would be the focal length of the lens required for correcting near vision?

A) \[+\,\,0.77\text{ }m\]

B) \[-\,\,0.60\,m\]

C) \[+\,\,0.002\text{ }m\]

D)  \[-\,\,0.03\,m\]

E)  None of these