0

Guest

Courses New

A traffic policeman standing on a road sounds a whistle emitting the main frequency of 2.00 kHz. What could be the apparent frequency heard by a scooter-driver approaching the policeman at a speed of 36.0 km h-1? Speed of sound in air = 340 m s-1.

A traffic policeman standing on a road sounds a whistle emitting the main frequency of 2.00 kHz. What could be the apparent frequency heard by a scooter-driver approaching the policeman at a speed of 36.0 km h-1? Speed of sound in air = 340 m s-1.

Grade:upto college level

1 Answers

Deepak Patra
askIITians Faculty 471 Points
9 years ago
Sol. Here given, apparent frequency = 1620 Hz So original frequency of the train is given by 1620 = (332 + 0 + 0/332 - 15) f ⇒ f = (1620 * 317/332) Hz So, apparent frequency of the train observed by the observer in F^1 = (332 + 0 + 0/332 + 15) f * (1620 * 317/332) = 317/347 * 1620 = 1480 Hz.

Think You Can Provide A Better Answer ?

Other Related Questions on Wave Motion

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More