17. How is the wavelength of infrared differs from the wavelength of ultraviolet waves?
A. Longer
C. The same
B. Shorter
D. None of the above
18. What is the main difference between a radio wave and a light wave?
A. Speed
C. Both A and B
B. Wavelength
D. None of the above
19. Which of the following is NOT an electromagnetic wave?
A. Infrared
C. Sound
B. Light
D. Radio
nf frequency of light waves with the wavelength of 12x10-8 m? (Write your computation below)​