When a user‚Äö√Ñ√∂‚àö√ë‚àö¬•s moving, the user‚Äö√Ñ√∂‚àö√ë‚àö¬•s velocity causes shift in frequency. This is called a?#

When a user‚Äö√Ñ√∂‚àö√ë‚àö¬•s moving, the use

1.	When a user‚Äö√Ñ√∂‚àö√ë‚àö¬•s moving, the user‚Äö√Ñ√∂‚àö√ë‚àö¬•s velocity causes shift in frequency. This is called a?#
A.	Doppler shift
B.	Frequency shift
C.	Velocity shift
D.	None of the mentioned
Answer» B. Frequency shift