A person observes two moving trains, 'A' reaching the station and 'B' leaving the station with equal speed of …. If both trains emit sounds with frequency …, (Speed of sound: …) approximate difference of frequencies heard by the person will be:

Option B. By doppler effect : …

Waves

JEE Main 2023 · 29 Jan, Morning shift · Q8533

PhysicsMedium85×since 2002Q8533

A person observes two moving trains, 'A' reaching the station and 'B' leaving the station with equal speed of

30 \mathrm{~m} / \mathrm{s}

. If both trains emit sounds with frequency

300 \mathrm{~Hz}

, (Speed of sound:

330 \mathrm{~m} / \mathrm{s}

) approximate difference of frequencies heard by the person will be: