A helium-neon laser (? = 632.8 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5°, what is the line spacing, d?
a. 1.81 × 10^?6 m
b. 1.00 × 10^?5 m
c. 1.00 × 10^?4 m
d. 1.31 × 10^?6 m
e. 6.76 × 10^?7 m
a
You might also like to view...
Venus may have started with an ocean's worth of water. If so, where is its water now?
A) The original water remains vaporized in the atmosphere due to Venus's intense heat. B) Most of the water is frozen beneath the surface. C) Most of the water combined with rocks in chemical reactions. D) The water was lost when ultraviolet light broke apart water molecules and the hydrogen escaped to space. E) The water changed to carbon dioxide through chemical reactions.
What types of observations are necessary to determine the absolute luminosity of a star?
What will be an ideal response?
Two people stand on different floors of an outdoor stairway. One is 6 m above the ground and the other is 12 m above the ground. The person on the lower floor throws a ball upward with a speed of 15 m/s and the other person just drops hers. Ignoring air resistance, which ball hits the ground at a higher speed?
A. The one thrown upward B. They both hit the ground with the same speed C. The one that is dropped
A mechanic is examining the wheel of a bicycle to adjust the brake. With the bicycle off the ground, he manually rotates the wheel until it reaches an angular speed of 12.0 rad/s and then allows it to coast to a stop
If the wheel has a moment of inertia of 0.100 kg ? m2, and the wheel slows uniformly to a stop in 160 s, what is the magnitude of the retarding torque? A) 1.00 N ? m B) 0.00750 N ? m C) 0.0787 N ? m D) 1.33 N ? m E) 1.67 N ? m