Answer:
4.741 × 10¹⁴ Hz
Step-by-step explanation:
Step 1: Given data
- Wavelength of the He-Ne laser (l): 632.8 nm
- Frequency of the He-Ne laser (n): ?
- Speed of light (c): 3.000 × 10⁸ m/s
Step 2: Convert "l" to meters
We will use the conversion factor 1 m = 10⁹ nm.
632.8 nm × (1 m / 10⁹ nm) = 6.328 × 10⁻⁷ m
Step 3: Calculate the frequency of the He-Ne laser
We will use the following expression.
c = l × n
n = c / l
n = (3.000 × 10⁸ m/s) / (6.328 × 10⁻⁷ m)
n = 4.741 × 10¹⁴ s⁻¹ = 4.741 × 10¹⁴ Hz