Find the radius of a star image formed on the retina of the eye ...

[KWilfred]

Find the radius of a star image formed on the retina of the eye if the aperture diameter (the pupil) at night is 0.70 cm and the length of the eye is 3.0 cm. Assume the wavelength of starlight in the eye is 600 nm. (1 nm = 10-9 m)
 a. 5.2  10-4 m
  c. 2.6  10-6 m
  b. 3.1  10-6 m
  d. 2.6  10-4 m

Question 2

A binary star system in the constellation Orion has an angular separation between the stars of 10-5 radians. Assuming a wavelength of 700 nm, what is the smallest aperture (diameter) telescope that will just resolve the two stars? (1 nm = 10-9 m)
 a. 8.5 cm
  c. 6.1 cm
  b. 4.2 cm
  d. 3.0 cm

[janieazgirl]

Answer to Question 1

B

Answer to Question 2

A

[KWilfred]

Thanks for the timely response, appreciate it

[tkempin]

Excellent