Question: A beam of electrons is accelerated from rest through a potential difference of 0.100 kV and then passes through a thin slit the diffracted beam

A beam of electrons is accelerated from rest through a potential difference of 0.100 kV and then passes through a thin slit the diffracted beam shows its first diffraction minima at ± 11.5° from the original direction of the beam when viewed far from the slit.

(a) Do we need to use relativity formulas? How do you know?

(b) How wide is the slit?

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