Saved Bookmarks
| 1. |
A person can see clearly objects between 15 and 100 cm from his eye. Find the range of his vision is he wears close fitting spectacles having a power of 0.8 diopter : |
|
Answer» <P>5 to 500 CM =-125 cm For NEAR point, `v_(1) = - 15 cm, u_(1) = ?` `therefore (1)/(f)=(1)/(V)-(1)/(u)rArr(-1)/(125)=(1)/(-15)-(1)/(u_(1))` `therefore u_(1) = - 17 cm` For distant point, `v_(2) = - 100 cm, u_(2) = ?` `(-1)/(125) = (1)/(-100)-(1)/(u_(2)),u_(2) = - 500 cm` Range is 17 to 500 cm |
|