Question

If the imge is visible how far is in from the glass

Answer 1

what u want to ask ?

image can be visible by our eyes not from glass

if u have spectacles, then ask ur doctor he will tell u

but normal vision of eye when we have to see far is infinite and near vision is 25 cm.

Answer 2

Explanation:

if the image is visible in case of concave lens or convex mirror it means it can be anywhere on the principle axis .

but in case of convex lens or concave mirror image is only visible ( without use of screen) only if it is between principal and focus .