The frequency of a radar is 780 MHz. After getting reflected from an approaching aeroplane, the apparent frequency is more than the actual frequency by 2.6 kHz. The aeroplane has a speed of the apparent frequency is more than the actual frequency by 2.6 kHz. The aeroplane has a speed of The frequency of a radar is 780 MHz. After getting reflected from an approaching aeroplane October 31, 2020 Category: Cengage NEET by C.P Singh , Chapter 17 - Sound Waves , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related