DP Physics (last assessment 2024)
Question 19N.3.HL.TZ0.6b
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.3.HL.TZ0.6b |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Calculate | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
19N.3.HL.TZ0.6b
A black hole has a Schwarzschild radius R. A probe at a distance of 0.5R from the event horizon of the black hole emits radio waves of frequency that are received by an observer very far from the black hole.
(b)
The probe emits 20 short pulses of these radio waves every minute, according to a clock in the probe. Calculate the time between pulses as measured by the observer.
[2]
Markscheme
time between pulses = 3 s according to the probe ✔
«s» ✔
