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Question 40

From Physics HL Paper 1 (May 2024, TZ2)

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  1. High speed electrons are directed at nuclei X. A graph of the variation of electron intensity with diffraction angle θ is shown for nuclei X. The minimum intensity occurs at θ = θmin.
A graph showing electron intensity on the y-axis and diffraction angle on the x-axis. The curve shows a minimum intensity at a specific diffraction angle labeled θ_min.
A graph showing electron intensity on the y-axis and diffraction angle on the x-axis. The curve shows a minimum intensity at a specific diffraction angle labeled θ_min.

Electrons of the same speed are directed at nuclei Y which have double the diameter of nuclei X.
What is correct about the nuclear density of Y and θmin for Y?

A table with two columns: 'Nuclear density of Y' and 'θ_min for Y', and four rows (A-D) with different combinations of 'Same as X', 'More than X', 'Decrease', and 'Increase'.
A table with two columns: 'Nuclear density of Y' and 'θ_min for Y', and four rows (A-D) with different combinations of 'Same as X', 'More than X', 'Decrease', and 'Increase'.

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