The deflection of alpha-particles throug...

The deflection of `alpha`-particles through a thin foil is due to

repulsion by the nucleus

interactions with protons

attractiong to nuclei

collision with `beta`-particles

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A beam of alpha - particle is incident on a gold foil . Corresponding to the incident beams A , B and C , the emergent beams A' , B' and C' . The transmission and deflection of alpha - particles through the foil take place such that

When alpha - particles are passed through a thin foil, then

When alpha particle are sent through a thin metal foil ,most of them go straight through the foil because

Draw a schematic arrangement of the Geiger Marsden experiment. How did the scattering of alpha particles by a thin foil of gold provide an important way to determine an upper limit on the size of nucleus? Explain briefly.

Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better. (a) Is the average angle of deflection of -particles by a thin gold foil predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model? (b) Is the probability of backward scattering (i.e., scattering of alpha -particles at angles greater than 90° ) predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model? (c) Keeping other factors fixed, it is found experimentally that for small thickness t, the number of alpha -particles scattered at moderate angles is proportional to t. What clue does this linear dependence on t provide? (d) In which model is it completely wrong to ignore multiple scattering for the calculation of average angle of scattering of alpha -particles by a thin foil?

When alpha particle are sent through a this metal foil mass of then go straight through the foil because

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