Discuss what observations convinced Rutherford that the nucleus was very small and dense
What will be an ideal response?
Alpha scattering from heavy nuclei produced much more backscattering than would be expected from a diffuse nuclear cloud. Only a dense compact nucleus of positive charge could account for the scattering at large angles.
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Why are more massive planets circling stars easier to detect than low-mass planets?
What will be an ideal response?
A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm exit pupil?
A) 5 times B) 10 times C) 25 times D) 100 times E) 250 times
A semiconductor has an energy gap of 2.5 eV. What is the longest wavelength light of those listed below that will promote valence electrons into the conduction band?
A) 450 nm B) 525 nm C) 600 nm D) 725 nm E) 350 nm
In a thick bed of sedimentary rocks we find an igneous dike. The order of formation is
A) together. B) igneous before sedimentary. C) sedimentary before igneous. D) unknown.