Photons are scattered through a thin aluminum foil. Find the change in wavelength of the photons, in pm, if they are detected at an angle o = 79.3° from their original direction.

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Photons are scattered through a thin aluminum foil. Find the change in wavelength of the photons, in pm, if they are detected at an angle p = 79.3° from their
original direction.
Transcribed Image Text:Photons are scattered through a thin aluminum foil. Find the change in wavelength of the photons, in pm, if they are detected at an angle p = 79.3° from their original direction.
Suppose. as in the last problem, photons are scattered through a thin aluminum foil. A detector starts at 0° and is slowly moved around in a circle around the
target foil, at e = 4.36 degrees per second. Find dlAA), the rate at which the change in wavelength is changing, in pm/s, at the moment the detector is at angle o
dt
dt
= 24.30. The sign will indicate if it is increasing or decreasing.
HINT:
must be changed to radians/second- why?
dt
Transcribed Image Text:Suppose. as in the last problem, photons are scattered through a thin aluminum foil. A detector starts at 0° and is slowly moved around in a circle around the target foil, at e = 4.36 degrees per second. Find dlAA), the rate at which the change in wavelength is changing, in pm/s, at the moment the detector is at angle o dt dt = 24.30. The sign will indicate if it is increasing or decreasing. HINT: must be changed to radians/second- why? dt
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The change in wavelength is given by the formula,

λ=hmoc1-cosϕ

ϕ is the angle of scattering=79.3°

Thus,

λ=2.43 1-cos79.3°λ=1.97 pm

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