Question

Question 27 The diffraction pattern for light of wavelength 525 nm is observed on the viewing screen 25 m away from the grating. If the distance y between the central fringe and the first bright fringe is 4.2 cm on the screen what is the slit separation? 1 pts 0.030 mm OBO 125 mm 0060mm 0.25 mm Question 28 A binary star system in the constellation Orion has an angular separation between the stars of 10 radians. Assuming a wavelength of 500 nm, what is the smallest aperture (diameter) telescope that will just resolve the two stars? (1 nm - 10 m) 1 pts 13 cm 30 cm 30cm 42cm 61 cm

Answer 1

Question 27 The diffraction pattern for light of wavelength 525 nm is observed on the viewing screen 25 m away from the grating. If the distance y between the central fringe and the first bright fringe is 42 cm on the screen what is the slit separation? 1 pts 0.030 mm 0.0 mm 1.25 mm 0060 0.25 mm Question 28 A binary star system in the constellation Orion has an angular separation between the stars of 10 radians. Assuming a wavelength of 500 nm, what is the smallest aperture (diameter) telescope that will just resolve the two stars? (1 nm - 10 m) 1 pts 13 cm 30 cm 30 cm 42cm 6.1 cm

27) 2 = 525 X10 -9 ae D = 2.5 m Y 4.2 cm = 4.2 x 16 in 5 Siit Siit Separation, d = AD y

d=525x10-9x2.5 4.2 x 10-2 d - 312.5 X 10 -7 m d = 0.030 0.030 mm อ2

(28) O - 10-5 lead 500 x 109 m he a = D = ? D = 1.222 π a 1.22x 5 x 10 -7 lors o D = 6.1 6.1 cm