The near vision of an average person is 25cm. To view an object with a

1.	The near vision of an average person is 25cm. To view an object with an angular magnification of 10, what should be the power of the microscope?
Answer» To see the final image at D = 25 cm For eye lens \(u=-f\) and \(v=-25\) cm \(m=\frac{v}{u}\) \(10=\frac{-25}{-f}\) f = 2.5 cm = 0.025 m power of the lens = \(\frac{1}{f}=\frac{1}{0.025}=+40D\)

The near vision of an average person is 25cm. To view an object with an angular magnification of 10, what should be the power of the microscope?

Answer»

To see the final image at D = 25 cm

For eye lens

\(u=-f\) and \(v=-25\) cm

\(m=\frac{v}{u}\)

\(10=\frac{-25}{-f}\)

f = 2.5 cm = 0.025 m

power of the lens = \(\frac{1}{f}=\frac{1}{0.025}=+40D\)