Scattered light in the atmosphere is often partially polarized. The best way to determine whether or not light from a particular direction in the sky shows polarization is to
a. diffract the light through a single slit.
b. squint while looking in that direction.
c. rotate a piece of polaroid film about an axis parallel to the ray while looking through it in that sky direction.
d. rotate a piece of polaroid film about an axis perpendicular to the ray while looking through it in that sky direction.
e. reflect the rays from that direction on a shiny metal surface.
c
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Globular clusters can be used to estimate the distance to galaxies by measuring the clusters' ____
a. angular diameter b. mass c. orbital speed d. age e. recession velocity
The path of a charged particle moving perpendicular to a uniform magnetic field will be a:
a. ellipse. c. straight line. b. circle. d. parabola.
Discuss what observations convinced Rutherford that the nucleus was very small and dense
What will be an ideal response?
For an ohmic conductor, current is
a. inversely proportional to voltage. b. inversely proportional to resistance. c. independent of resistance. d. independent of voltage.