Q. Sound waves travel at $350\ m/s$ through a warm air and at $3500\ m/s$ through brass. The wavelength of a $700\ Hz$ acoustic wave as it enters brass from warm air
A) Decreases by a factor 20
B) Decreases by a factor 10
C) Increases by a factor 20
D) Increases by a factor 10
Explanation
(d) $\because$ frequency is same in both the medium
$\therefore$ $\lambda \propto$ speed
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.