22. Which of the following correctly relates wavelength and frequency?
A. The higher the wavelength, the higher the frequency.
B. The lower the wavelength, the higher the frequency.
C. The lower the wavelength, the lower the frequency
D. The wavelength is directly related to frequency.
23. Which of the following is the fastest?
A. A wave wit h 10 m wavelength and a frequency of 30 Hz.
B. A wave with 30 m wavelength and a frequency of 2 Hz.
C. A wave with 20 m wavelength and a frequency of 2 Hz
D. A wave with 5 m wavelength and a frequency of 60 Hz.)
24. How can we generate mechanical waves?
A. By producing light energy
C. By vibrating a medium
B. By producing horizontal motion
D. All of the above
25. A high energy electromagnetic wave has
A. Low frequency B. High Frequency C. Zero wave speed D. Highest wave speed​