You can buy a pair of 3.5 Diopter reading glasses off the rackat the local pharmacy. What is the focal length of these glasses incentimeters ?
2.86×10¹cm

Computer's answer now shown above. You arecorrect. Your receipt no. is 163-8554

Previous Tries

The prescription for your corrective lenses is -6.5 D. What willtheir focal length be?
cm

You are trying to burn a leaf using a pair of you grandmother'sold reading glasses. If the reading glasses are rated with arefractive power of 4.25 D, how far must you hold the glasses fromthe leaf in order to burn through the leaf as quickly aspossible?
cm

Answer rating: 100% (QA)

Part 1 power P 35D positive power means the lens are conver... View the full answer