Final answer:
The speed of an EM wave with a frequency of 3.33 x 10⁷ Hz is the same as the speed of light, which is 3.00 × 10⁸ m/s, a fundamental constant for all electromagnetic waves in a vacuum.
Step-by-step explanation:
The speed of an electromagnetic (EM) wave that has a frequency of 3.33 x 10⁷ Hz can be calculated using the formula c = fλ, where c is the speed of light in a vacuum, f is the frequency, and λ is the wavelength. As all EM waves travel at the speed of light in a vacuum, the speed you're looking for is the speed of light, which is 3.00 × 10⁸ m/s. It's a fundamental constant in physics and is the same for all frequencies of electromagnetic radiation in a vacuum, which includes the frequency given in your question, falling within the range for visible light.