# Physics

posted by .

A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion
moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal
angles θ with the direction of motion. Find the angle θ and the energies of the two gamma rays. Hint:
gamma rays are electromagnetic radiation with E=pc.

## Similar Questions

1. ### modern physics

A pi meson of mass m moves with a speed u in the positive y direction in frame S with parameters BETA = u/c and GAMMA = 1/[sqrt(1 - BETA^2)]. The pion decays into two gamma rays. An observer S' moves in the positive x direction with …
2. ### physics

A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction …
3. ### Physics

A pion has rest energy 135MeV. It decays into two gamma rays that travel at the speed of light. A pion moving through the lab frame at v=0.98c decays into two gamma rays of equal energies, making equal angles θ with the direction …
4. ### Physics

Gamma rays of photon energy 0.511 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there.a) What is the wavelength of the incident gamma rays?
5. ### Physics

Gamma rays of photon energy 0.511 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there.a) What is the wavelength of the incident gamma rays?
6. ### Physics

Gamma rays of photon energy 0.511 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there.a) What is the wavelength of the incident gamma rays?
7. ### relativity

A particle called neutral pi meson (or pion) decays into two photons (and nothing else).If the pion (whose rest mass is 135Mev) is initially at rest, What are the energies of the photons?
8. ### Relativity

A particle called neutral pi meson (or pion) decays into two photons and nothing else. If the pion (whose rest mass is 135Mev) is initially at rest (a) what are the energies of the photons?
9. ### relativity

A particle called neutral pi meson (or pion) decays into two photons and nothing else. If the pion is initially at rest (rest mass 135Mev). (a) what are the energies of the photons ?
10. ### Physics

Gamma-ray bursters are objects in the universe that emit pulses of gamma rays with high energies. The frequency of the most energetic bursts has been measured at around 3.0 × 10 21 Hz. The speed of light is 3 × 10 8 m/s. What is …

More Similar Questions