Consider 550. nm light passing through 2 narrow slits 2.10 micro-meters apart. The 1st and 2nd order fringes are 1.00 mm apart on a distant screen. How far apart are the 2nd and 3rd order fringes?
A) 1.35 mm
B) 1.00 mm
C) 0.750 mm
D) 0.500 mm
E) 1.74 mm
E
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Diffraction Gratings: Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?
A. 0.93 ?m B. 1.4 ?m C. 2.8 ?m D. 8.5 ?m
Molecular Bonds: In general, which of the following is usually the weakest bond?
A. hydrogen bond B. van der Waals bond C. ionic bond D. covalent bond
Magnifying Glass With the Image at Infinity: The focal length of a magnifying glass is 15 cm. If the near point of a person is 25 cm, what is the angular magnification of the glass for this person when his eyes are focused at infinity?
A. 1.7 B. 2.7 C. 3.7 D. 4.7 E. 5.7
The maximum permissible workday dose for occupational exposure to radiation is 11 mrem. A 77 kg laboratory technician absorbs 2.3 mJ of 0.5 MeV gamma rays in a work day. The relative biological efficiency (RBE) for gamma rays is 1.00
The number of gamma-ray photons absorbed by the technician in a workday is closest to: A) 3 × 1010 B) 3 × 109 C) 3 × 108 D) 1 × 109 E) 1 × 108