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Physics · 2023 · 3 marks
CBSE 2023 · Region 4 · Set 1 · Q30
Briefly explain Geiger-Marsden experiment. Show the variation of the number of particles scattered ( N ) with scattering angle ( θ ) in this…
Briefly explain Geiger-Marsden experiment. Show the variation of the number of particles scattered ( N ) with scattering angle ( $\displaystyle \theta$ ) in this experiment. What is the main conclusion that can be inferred from this plot?
Marking-scheme solution
Alpha-particles emitted by a radioactive source were allowed to fall on a thin foil of gold .The scattered alpha-particles were observed through a rotatable detector consisting of zinc sulphide screen and a microscope. The scattered alpha-particles on striking the screen produced brief light flashes or scintillations.
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CBSE Class 12 Physics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.