A person's near point is `50 cm` and his far point `3m`. Power of the lenses he requires for
`(i)` reading and
`(ii)` for seeing distant stars are

A persons near point is 50 cm and his far point is 3m. Powers of the lenses he requires for (i) reading and (ii) seeing distant stars are

A persons near point is 0.5 m and far point is 2 m. Power of spectacles lenses required for reading purposes is :

A student's near point is 0.5 m and far point is 3m . What are the powers of the spectacle lenses required for (a) reading the books and (b) seeing the distant objects ?

The near point of a person is 50 cm and the far point is 1.5m . The spectales required for reading purpose and for seeing distant objects are respectively

The near point of a person is 50 cm and the far point is 1.5m . The spectacles required for reading purpose and for seeing distant objects are respectively

A person whose far-point is at 30cm wants to read at 50cm . The power of the lens should be