A hypothetical particle has a mass of 510 MeV/c2. If such a particle at rest decays into two gamma-ray photons, what is the wavelength of each photon?

(1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J? s)


4.87 × 10-15 m

Physics & Space Science

You might also like to view...

What is not used in determining a distance from spectroscopic parallax?

A: apparent brightness B: temperature from spectrum C: H-R Diagram D: inverse square law E: none of the above- they're all used!

Physics & Space Science

As a rotating gas cloud contracts, it spins faster

Indicate whether the statement is true or false

Physics & Space Science

The following formulas are supposed to describe the speed of a sphere sinking in a thick fluid. C is a unitless constant, is the fluid’s density in kg/m3, A is the sphere’s cross-sectional area, m is its mass, and is the gravitational field strength in N/kg. Which could be right?

A. = CA g
B. = Cmg/ A
C. = (Cmg/ A)2
D. = (Cmg/ A)1/2
E. None of these can be correct.

Physics & Space Science

Eukaryotes

A) are made of two cells fused together B) are all unicellular C) can be unicellular or multicellular D) are all multicellular

Physics & Space Science