Choosing a minor to complement a bachelor's degree in applied physics can enhance job prospects, but the demand for minors is generally low. A minor serves as formal recognition of advanced coursework in a specific area, which can be beneficial during job searches. Geology may be a suitable choice if interested in geophysics, while a chemistry minor could be advantageous for those leaning towards material science. However, selecting a minor may limit opportunities to explore other fields, so it's essential to consider personal interests and career goals when making a decision.