Strong x-ray beams can be produced when
A. beta rays are absorbed by bones.
B. alpha rays pass through a thin metal foil.
C. cathode rays strike a metal anode.
D. gamma rays move through a magnetic field.
Answer: C
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The emission lines from O III are called ____ because they are not visible laboratories on Earth due to the much greater pressure of the gas on Earth
a. unique lines b. unresolved lines c. forbidden lines d. unseen lines e. "fathom" lines
Suppose you view the solar system from high above Earth's North Pole. Which of the following statements about planetary orbits will be true?
A) All the planets orbit counterclockwise around the Sun. B) The inner planets orbit the Sun counterclockwise, whereas the outer planets orbit the Sun clockwise. C) All the planets except Uranus orbit the Sun counterclockwise; Uranus orbits in the opposite direction. D) The inner planets orbit the Sun clockwise, whereas the outer planets orbit the Sun counterclockwise.
Spectral Series: The Balmer series is formed by electron transitions in hydrogen that
A. end on the n = 1 shell. B. begin on the n = 1 shell. C. end on the n = 2 shell. D. begin on the n = 2 shell. E. are between the n = 1 and n = 3 shells.
Compton Scattering: X-rays of energy 3.5 × 104 eV scatter through an angle of 105° off of a free electron. What is the energy (in eV) of the scattered x-rays? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
Fill in the blank(s) with the appropriate word(s).