A parallel light beam containing two wavelengths, 480. nm and 700. nm, strikes a plain piece of glass at an angle of incidence of 60°. The index of refraction of the glass is 1.4830 at 480. nm and 1.4760 at 700. nm
Determine the angle between the two beams in the glass.
0.196°
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A high-voltage transmission line carries 500 A at 700 kV for a distance of 100 miles. If the resistance in the wire is 1 W/mile, what is the power loss due to resistive losses?
a. 250 MW c. 25 MW b. 2.5 kW d. 25 kW
Which type of curve would accurately represent a closed orbit?
a. ellipse b. hyperbola c. parabola d. straight line
What types of events have scientists so far been able to detect with gravitational wave observatories, such as LIGO?
A) x-ray bursts B) supernovae C) mergers of closely-orbiting pairs of neutron stars or black holes D) the gradual decay over many years of the orbits of binary neutron stars