The class is about heat, waves, and light. The website wants exactly the perfect answer and in the same metric system units that are stated on the calculators that are on the picture for the question, if not, it'll mark it wrong.

Set 18 Problem 6 a. How far away can a human eye distinguish two car headlights 1.99 m apart? Consider only diffraction effects and assume an eye diameter of 5.0 mm and a wavelength of 482 nmi Use the result for the diffraction-limited resolution of light of wavelength it. through a circular aperture of diameter D, 6 = 1.22 ND. Remember that the angle 8 is measured in radians. b. What is the minimum angular separation an eye could resolve when viewing two stars, considering only diffraction effects?Assume the wavelength is 482 nm. (In reality, it is about 1' of are, or 1 minute of arc,which is 1160 of a degree. Why is it not your answer to part b?) The units of the answer should be are minutes. The reason your answer is a somewhat different from the observed value of l' is that lens aberrations limit the actual angular resolution to a value a bit worse (but of the same order of magnitude) compared to the diffraction-limited value