A student analyzes Compton-scattering data and obtains a straight-line fit given by

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

\Delta\lambda=(2.55\times10^{-12}\,\text{m})(1-\cos\theta)

. Using the electron mass

m_e=9.11\times10^{-31}\,\text{kg}

and the speed of light

c=3.00\times10^{8}\,\text{m\,s}^{-1}

, which of the following is the best estimate of Planck’s constant

h

implied by the data? (a)

9.1\times10^{-34}\,\text{J\,s}

(b)

7.0\times10^{-33}\,\text{J\,s}

(c)

6.7\times10^{-34}\,\text{J\,s}

(d)

3.5\times10^{-34}\,\text{J\,s}