Which of the following is a wrong statement ?

Question

Which of the following is a wrong statement ? (A) D =(1/f) where f is the focal length and D is called the refractive power of a lens. (B) Power is called a dioptre when f is in metres (C) Power is called a dipotre and does not depend on the system of unit used to measure f. (D) D is positive for convergent lens and negative for divergent lens.

Tardigrade Admin · Accepted Answer

Power of a lens in dioptre depends upon system of units

Q. Which of the following is a wrong statement ?

$D = \frac{1}{f}$ where $f$ is the focal length and $D$ is called the refractive power of a lens.

Power is called a dioptre when $f$ is in metres

Power is called a dipotre and does not depend on the system of unit used to measure $f$ .

$D$ is positive for convergent lens and negative for divergent lens.

Power of a lens in dioptre depends upon system of units

Q. Which of the following is a wrong statement ?

D=f1​ where f is the focal length and D is called the refractive power of a lens.

Power is called a dioptre when f is in metres

Power is called a dipotre and does not depend on the system of unit used to measure f.

D is positive for convergent lens and negative for divergent lens.

Power of a lens in dioptre depends upon system of units

$D = \frac{1}{f}$ where $f$ is the focal length and $D$ is called the refractive power of a lens.

Power is called a dioptre when $f$ is in metres

Power is called a dipotre and does not depend on the system of unit used to measure $f$ .

$D$ is positive for convergent lens and negative for divergent lens.