To find the wavelength of a microwave with a given frequency, you can use the formula:
wavelength = speed of light / frequency
The speed of light in a vacuum is approximately 3 x 10^8 meters per second.
Let's plug in the values:
wavelength = (3 x 10^8 m/s) / (4.2 x 10^8 Hz)
Calculating the division:
wavelength ≈ 0.714 meters
Therefore, a microwave with a frequency of 4.2 x 10^8 Hz has a wavelength of approximately 0.714 meters.