Chapter 2 - Section 2-1 - Sample Spaces and Events - Exercises - Page 27: 2-24

(a) S={0,1,2,3,....} (b) A={675,676,...,700} (c) B={450,451,...500} (d) A∩B=φ (e) A∪B={450,451,..,500,675,676,...700}

(a) S={0,1,2,3,....} because the wavelengths of light take a non negative integer and measured by the nearest nanometer (b) A={675,676,...,700} (c) B={450,451,...500} (d) A∩B=φ, the empty set (e) A∪B={450,451,..,500,675,676,...700}