Final answer:
The angular width of the central maximum in the double-slit experiment for electrons can be calculated using the formula λ / d. The speed of the electrons does not directly affect the angular width, but if the speed is reduced, the wavelength and angular width will also be reduced by the same factor. The de Broglie wavelength of the electrons can be calculated using λ = h / p.
Step-by-step explanation:
In the double-slit experiment for electrons, the angular width of the central maximum can be calculated using the formula:
Angular width = λ / d
where λ is the wavelength of the electrons and d is the distance between the slits. The speed of the electrons is not directly needed to calculate the angular width. However, if the speed of the electrons is reduced by a factor of 1.5, the wavelength and therefore the angular width of the central maximum will also be reduced by the same factor.
Assuming the electrons have a de Broglie wavelength of λ = h / p, where h is the Planck's constant and p is the momentum of the electrons, we can use the known values of h and the reduced speed of the electrons to calculate the new angular width.