Q. A wavelength $0.60\ cm$ is produced in air and it travels at a speed of $300\ ms^{- 1}.$ It will be an
A) Audible wave
B) Infrasonic wave
C) Ultrasonic wave
D) None of the above
Explanation
(c) $n = \frac{v}{\lambda} = \frac{300}{0.6 \times 10^{- 2}}Hz = \frac{3}{6} \times 10^{4}Hz = 50,000Hz$
$\Rightarrow$ Wave is ultrasonic
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.