A Two point sources (pixels) of monochromatic radiation can be resolved as close

Question

A Two point sources (pixels) of monochromatic radiation can be resolved as close as 1.1 cm apart when viewing them at a distance of 1800 m through a lens 3 cm in diameter. What is the wavelength of the radiation? A) 9.9 times 10^-7 m B) 3.3 times 10^-7 m C) 1.503 times 10^-7 m D) 5.94 times 10^-7 m E) 6.6 times 10^-7 m Changing the f-number of a camera lens by 4X will change the light intensity admitted to the film by what factor? A) 2 B) 0.0625 C) 4 D) 0.25 E) 16 For a person with a Near Point (NP) = 55 cm, what would be his prescription's lens power = _______ diopters A) 1.375 diopters B) 1.1 diopters C) 2.182 diopters D) 1.157895 diopters E) 0.44 diopters A telescope has an objective lens with a focal length of 85 cm and an eyepiece of focal length 3.6 cm. What would be the lens power in diopters of a third lens touching the objective lens to achieve a magnification of 259.722222? A) -3.7638 D B) -2.78 D C) -2.996795 D D) -1.07 D E) -4.0205 D

Explanation / Answer

17)(C)1.503 x 10^-7 m

From Rayleigh difraction

d = 1.22 lambda D/x

lambda = xd/1.22 D

lambda = 0.011 x 0.03/1.22 x 1800 = 1.503 x 10^-7 m

Hence, (C)1.503 x 10^-7 m is the correct answer.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.