An atom that has lost or gained one or more electrons is called a(n) ____
a. ion
b. isotope
c. nucleus
d. molecule
e. electron
a
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In general, which type of planet would you expect to cause the largest Doppler shift in the spectrum of its star?
A) a massive planet that is close to its star B) a massive planet that is far from its star C) a low-mass planet that is close to its star D) a low-mass planet that is far from its star
Snell's Law: A thin flashlight beam traveling in air strikes a glass plate at an angle of 52° with the plane of the surface of the plate. If the index of refraction of the glass is 1.4, what angle will the beam make with the normal in the glass?
A. 34° B. 64° C. 26° D. 56° E. 38°
Which of the following provides evidence to support models of how fusion occurs in the Sun's core?
A) solar neutrinos B) solar flares C) Sun spots D) x-ray observations E) careful study of the Sun's atmospheric structure
A beam of light that is parallel to the principal axis is incident on a convex mirror. What happens to the reflected beam of light?
A) It also is parallel to the principal axis. B) It is perpendicular to the principal axis. C) It appears to be coming from the focal point on the other side of the mirror. D) It appears to be coming from the center of curvature of the mirror. E) It appears to be coming from a point between the focal point and the center of curvature of the mirror.