Question

The resolving power of human eye is

• A. $\approx 1^{\prime }$
• B. $\approx 1^{\circ }$
• C. $\approx {10}^{\circ }$
• D. $\approx {10}^{\prime }$

Answer 1

The correct option is A $\approx 1^{\prime }$

Human eye is also an optical instrument. The limit of resolution of human eye is one minute $\left(1^{\prime }\right)$ or $\frac{1}{60}$ degree.

It means that if two distant objects subtend an angle on the eye, which is greater than $1^{\prime }$ are seen as separate by the eye.

Hence, option $\left(\text{A}\right)$ is correct.