Light in a frozen block of ice reflects off the ice-air interface and undergoes a phase shift of
A) 0°.
B) 45°.
C) 90°.
D) 180°.
E) 270°.
A
You might also like to view...
The Declaration of Principles Concerning Activities Following the Detection of Extraterrestrial Intelligence states that the first thing to do after the detection of a possible signal is to
A) send a reply B) announce the discovery to the public C) confirm that it is genuine D) classify it top secret
In Einstein's special theory of relativity, there is one basic principle [or assumption, or law] that seems very odd to our intuitions, and that is responsible for the odd nature of Einstein's conclusions. This basic principle is
A) the idea that all motion is merely relative motion, i.e., that it is impossible to determine how fast you are moving without measuring against something outside your laboratory. B) E = mc2. C) the idea that mass is relative, and is larger when it is moved faster. D) relativistic length contraction. E) the idea that light has the same speed for all nonaccelerated observers.
Once a planet forms in a disk-like nebula around a star, its orbit is fixed and will never change
Indicate whether the statement is true or false
A ball is thrown straight up with an initial velocity of 10 m/s. After 3 seconds its velocity will be
A. 29.4 m/s. B. 19.4 m/s. C. -19.4 m/s. D. 0 m/s. E. -29.4 m/s.