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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 18.4 | Relativistic Transformation of Velocity and the Relativistic Doppler Effect |
1. A particle is moving at 0.8c due right and at a certain point it explodes in two equal daughter particles where one of them moves in the original direction at 0.7c relative to the parent particle. What is the velocity of daughter particle when viewed from a stationary position to the Earth surface?
Correct Answer: A
2. A helium atom is in a galaxy travelling at a velocity of 4.78 × 106 m/s away from the Earth. An astronomer on Earth observes a frequency of 6.52 × 1014 Hz emitted from the helium atom. What frequency of light is really emitted from this helium atom?
Correct Answer: C
3. An astronomer is observing a remote galaxy from Earth. Measurements show that the light waves emitted by helium atoms, which normally have a wavelength of 600 nm, are observed from Earth at the new wavelength 500 nm. How fast is the galaxy moving towards or away from us?
Correct Answer: D
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