If the speed of light in a sphere is 2 × 108 m/s, its index of refraction is
A) 0.50.
B) 0.67.
C) 1.0.
D) 1.5.
E) 2.0.
Answer: B
You might also like to view...
The magnetic field at point P due to a 2.0-A current flowing in a long, straight, thin wire is 8.0 ?T. How far is point P from the wire? (?0 = 4? × 10-7 T ? m/A)
A) 10 cm B) 2.0 cm C) 5.0 cm D) 2.5 cm E) 4.0 cm
Dark energy accounts for about 70% of the critical density of the Universe
a. True b. False Indicate whether the statement is true or false
Answer the following statement(s) true (T) or false (F)
A light-emitting diode has the property that the potential difference between its ends is approximately 1.5 V when it conducts currents ranging from 1 mA to 50 mA. This device is ohmic.
The nebular theory of the formation of the solar system successfully predicts all but one of the following. Which one does the theory not predict?
A) Planets orbit around the Sun in nearly circular orbits in a flattened disk. B) the compositional differences between the terrestrial and jovian planets C) the equal number of terrestrial and jovian planets D) asteroids, Kuiper-belt comets, and the Oort cloud E) the craters on the Moon