When a beam of light, which is traveling in glass, strikes an air boundary, there is
A)
a 90° phase change in the reflected beam.
B)
no phase change in the reflected beam.
C)
a 180° phase change in the reflected beam.
D)
a 60° phase change in the reflected beam.
E)
a 45° phase change in the reflected beam.
B
You might also like to view...
Which of the following has your "cosmic address" in the correct order?
A) you, Earth, solar system, Local Group, Local Supercluster, Milky Way Galaxy, universe B) you, Earth, solar system, Milky Way Galaxy, Local Group, Local Supercluster, universe C) you, Earth, Local Group, Local Supercluster, solar system, Milky Way Galaxy, universe D) you, Earth, solar system, Local Group, Milky Way Galaxy, Local Supercluster, universe E) you, Earth, Milky Way Galaxy, solar system, Local Group, Local Supercluster, universe
Measured ages of globular clusters suggests that the Universe is about
a. 1.4 billion years old. b. 14 billion years old. c. 140 billion years old.
0.00325 × 10-8 cm can also be expressed in mm as
A) 3.25 × 10-12 mm. B) 3.25 × 10-11 mm. C) 3.25 × 10-10 mm. D) 3.25 × 10-9 mm. E) 3.25 × 10-8 mm.
On average, the stars in elliptical galaxies are older than the stars in spiral galaxies
Indicate whether the statement is true or false