A person using spectacles with a focal length of +1 m is unable to see objects clearly beyond 1 m . This situation occurs

Step-by-step solution

Using the lens formula: 1 v - 1 u = 1 f Given the focal length of the spectacles f = +1 m and the maximum object distance u = -1 m : 1 v - 1 -1 = 1 1 1 v + 1 = 1 1 v = 0 v = The spectacles form the image of the object at 1 m at infinity. Since the person can see this image clearly but nothing beyond it, their far point must be exactly at infinity. A far point at infinity is the characteristic of an eye with normal vision. For a nearsighted (myopic) eye, the far point is at a finite distance, so the maximum visible