Final answer:
The frequency of red light emitted from a helium-neon laser is approximately 4.74 × 10¹⁴ Hz, with the closest answer from the given options being 6 × 10¹⁴ Hz.
Step-by-step explanation:
The frequency of red light emitted from a helium-neon laser can be calculated using the formula for the speed of light, c = λf, where λ is the wavelength and f is the frequency. The known wavelength of helium-neon laser light is 633 nm, which is equivalent to 633 × 10⁻⁹ meters. To find the frequency (f), we can rearrange the formula to f = c / λ. Using the speed of light c as 3 × 10⁸ m/s, the frequency is calculated as f = 3 × 10⁸ m/s / 633 × 10⁻⁹ m which equals approximately 4.74 × 10¹⁴ Hz. Thus, the closest answer from the options given is (b) 6 × 10¹⁴ Hz.