Amachinist with normal vision has a near point at 25 cm. this machinist wears +4.25-diopter eyeglasses in order to do very

Amachinist with normal vision has a near point at 25 cm. this machinist wears +4.25-diopter eyeglasses in order to do very close work. with these eyeglasses, what is the near point of the machinist? assume that he wears the glasses extremely close to his eyes.


Leave a Reply 3

Your email address will not be published. Required fields are marked *


Expert

Expert

what are the statements? x

Expert

Expert

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..

sumansmith5288

sumansmith5288

[tex]d_i = 400.2 cm[/tex]

Explanation:

As we know that normal near point is given as

[tex]d_o = 25 cm[/tex]

now the power of the lens used is

[tex]P = 4.25 dioptre[/tex]

focal length of the lens will be

[tex]F = \frac{1}{P} = \frac{1}{4.25}[/tex]

[tex]F = 23.53 cm[/tex]

now we have

[tex]\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{F}[/tex]

now plug in all values in it

[tex]\frac{1}{d_i} +\frac{1}{25} = \frac{1}{23.53}[/tex]

[tex]d_i = 400.2 cm[/tex]