| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.HL.TZ2.16 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 16 | Adapted from | N/A |
Question
A radar speed gun is used to measure the speed of a car. The car is moving with speed v away from the gun.
The radar emits microwaves of frequency f and speed c. Which of the following is the frequency of the microwaves measured at the gun after reflection by the car?
A. \(f + \left( {\frac{{2v}}{c}f} \right)\)
B. \(f + \left( {\frac{v}{c}f} \right)\)
C. \(f - \left( {\frac{{2v}}{c}f} \right)\)
D. \(f - \left( {\frac{v}{c}f} \right)\)
Markscheme
C
Examiners report
