Question

the near point of a person suffering from hypermeteropia is 75 cm calculate the focal length and power of the lens required to enable him to read the newspaper which is kept at 25 cm from eye ​

Answer 1

Question ⚠️The near point of a person suffering from hypermeteropia is 75 cm calculate the focal length and power of the lens required to enable him to read the newspaper which is kept at 25 cm from eye ​

Answer ⚠️ U = - 25 cm

V = - 75 cm

⭕️ 1/u - 1/v = 1/f

⭕️ 1/-75 - 1/-25 =1/f

⭕️ 1/-75 + 1/-25 =1/f

Answer ➡️ 2/75 = 1/f

⭕️ f = 75/2 = 37.5 cm

So , power

P = 100/ 37.5 cm

➡️ = 2.6 D ⬅️

Hope it help

Answer 2

Answer:2.6D is the power and focal length is 37.5

Explanation: