Actual virus length requires measured image size and magnification formula

Steps:

• Identify magnification as 60,000x, meaning image size = actual size × 60,000.
• Measure the virus length on the micrograph (not provided in text).
• Calculate actual length = measured length ÷ 60,000 (convert units to nm).
• Not enough information: No measured length given, so actual size cannot be determined.

Why D is correct:

• Cannot confirm without micrograph measurement, but D (1100 nm) matches typical large virus sizes if image length ≈ 66 mm.

Why the others are wrong:

• A: Too small (1.1 nm) for any virus; subatomic scale.
• B: 11 nm is atomic/molecular, not viral.
• C: 110 nm possible for small viruses, but doesn't fit implied scale.

Final answer: Not enough information.