Polarized light is to have its polarization plane rotated by 90°. In which of the following cases does the final beam have the greatest intensity?
a. 3 polarizing filters, each rotate beam by 30°.
b. 2 polarizing filters, both rotate beam by 45°.
c. 1 polarizing filter, rotating beam by 90°.
d. None of the above, polarized light can't be rotated.
a
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__________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies
a. Ring galaxies b. Spiral galaxies c. Rotation curves d. Tidal tails e. Irregular galaxies
Which of these is NOT a vector quantity?
a. translational momentum b. angular momentum c. acceleration d. rotational kinetic energy e. velocity
A particle (mass = 6.7 × 10^-27 kg, charge = 3.2 × 10^-19 C) moves along the positive x axis with a speed of 4.8 × 10^5 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
a. 2.0 kN/C b. 1.5 kN/C c. 1.2 kN/C d. 3.5 kN/C e. 2.4 kN/C
Supernovae can trigger star formation
a. True b. False Indicate whether the statement is true or false