Caloris is well named, for at every perihelion, it faces the Sun directly
Indicate whether the statement is true or false
TRUE
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Gravitational lensing of distant, faint irregular galaxies may be the key to
A) understanding galactic rotation curves. B) understanding active galactic nuclei. C) quasar energy production. D) mapping dark matter. E) determining galactic redshifts.
Snell's Law: A light ray in air strikes a glass plate whose index of refraction is 1.42. Some of the light reflects off the surface of the plate, but most of it enters the glass. If the angle of refraction is one-half the angle of reflection, the angle of refraction is closest to which one of the following angles?
A. 45° B. 43° C. 41° D. 39° E. 37°
The following are positioned in sequence: A source of a beam of natural light of intensity I0; three ideal polarizers A, B, and C; and an observer. Polarizer axis angles are measured clockwise from the vertical, from the perspective of the observer
The axis angle of polarizer A is set at 0° (vertical), and the axis angle of polarizer C is set at 50°. Polarizer B is set so that the beam intensity is zero at the observer. Which of the following pairs of angles are possible axis angle settings of polarizer B? A) 90° and 130° B) 90° and 140° C) 40° and 130° D) 40° and 90° E) 40° and 140°
Although Saturn and Jupiter have similar compositions their outer appearances are different because
A. Saturn's cooler temperatures allow for the formation of a hazy layer of ammonia clouds that surrounds the planet. B. Saturn has more water molecules throughout its atmosphere giving it a uniform appearance. C. Saturn's smaller size means it has a weaker gravitational field and thus less dramatic atmospheric effects. D. Saturn's magnetic field is weaker than Jupiter's magnetic field.