Question 9 • *25-26 KCS18 Chemistry IC
Convert the collider’s length to nanometers: 27 km × 1,000 m/km × 1 × 10⁹ nm/m = 2.7 × 10¹³ nm. Divide by the wavelength, 650 nm: (2.7 × 10¹³) ÷ 650 ≈ 4.2 × 10¹⁰ wavelengths. So the correct choice is A, 4.2 × 10¹⁰ wavelengths.
AI-written and checked against the verified answer.