Deduce the strangeness of the Ω^– particle.

The Feynman diagram shows a quark change that gives rise to a possible decay of the Ω^– particle.

(i) Identify X.

(ii) Identify Y.

The number of lines per millimetre in the diffraction grating in (b) is reduced. Describe the effects of this change on the fringe pattern in (b).

-3;

(i) anti u (quark) /\(\bar u\);
(ii) W^–;

principal maxima broaden;

secondary maxima appear;