Q.1.
Wave frequency is measured in which unit?
Q.2.
A keyboard player plays a note of 440 Hz. What does this mean?
Q.3.
If a wave of 440 Hz travels at 340 m/s, what is its wavelength?
Q.4.
What is the wavelength of the microwaves used by a cell phone operator that uses microwaves with a frequency of 1.8 x 10 Hz and which travel at a speed of 3.0 x 10 m/s to transmit their signals?
Q.5.
Electromagnetic waves travel through space at a speed of 3.0 x 10 m/s. The radio waves emitted from a distant galaxy have a wavelength of 25 meters. What is the frequency of the radio waves emitted from the galaxy?
Q.6.
Electromagnetic waves travel at a speed of 3.0 x 10 m/s through the air. A radio station transmits using waves with a wavelength of 1.9 x 10 m. At what frequency would you need to set your radio to receive this particular station's programs?
Q.7.
A group of students carried out an experiment using a ripple tank. They measured the frequency of a wave as being 14 Hz with a total of 20 wave crests in the tank. The tank was 40 cm long. How fast was the wave traveling?
Q.8.
What is the wavelength of the musical note middle C? It has a frequency 256 Hz and the speed of sound is 335 m/s.
Q.9.
Waves are diffracted when they pass through a gap that is about the same width as their wavelength. What width of gap would be required to cause microwaves of frequency 1.5 x 10 Hz to diffract?
Q.10.
Snakes swim by vibrating their body from side to side, just like a transverse wave. The faster they vibrate, the faster they move through the water. A 90 cm long snake in a lake travels with a velocity of 1.8 m/s. At what frequency does it vibrate its body?