Question

What is the diameter of an aperture needed for two objects to be viewed as separate, if the minimum angle is 7.39 degrees (0.129 radians) and the wavelength of light is 746 nm?

A. 7060 nm

B. 3.63×10⁴ nm

C. 1.82×10⁴ nm

D. 123 nm

Answer 1

If is the wavelength of the light, and D is the diameter of the aperture, then the angle of reslolution is given by,

Given = 0.129rad and = 746nm. Then,

So the diameter of an aperture is 7060nm.

Option (A) is the correct answer.