Author Question: An ultraviolet light wave has a wavelength of 300 nm and speed of 1.8 108 m/s through a transparent ... (Read 87 times)

gonzo233 · **on:** Jul 28, 2018

An ultraviolet light wave has a wavelength of 300 nm and speed of 1.8 108 m/s through a transparent medium. What is the frequency of this wave in the medium? (1 nm = 10-9 m and c = 3.00 108 m/s)
a. 7.0 1014 Hz
c. 6.3 102 Hz
b. 6.0 1014 Hz
d. 10 1014 Hz

Question 2

An airplane flying with a constant speed flies from a warm air mass into a cold air mass. The Mach number (the ratio of the speed of the airplane to the speed of sound) will:
a. increase.
c. stay the same.
b. decrease.
d. become unstable.