The frequency of an electromagnetic wave can be calculated using the formula:
Frequency (f) = Speed of Light (c) / Wavelength (λ)
In this case, the speed of light (c) is approximately 3.00 x 108 m/s and the wavelength (λ) is 250 nanometers (nm). To use this formula, we must first convert the wavelength from nanometers to meters:
- 250 nm = 250 x 10-9 m = 2.5 x 10-7 m
Now, substituting the values into the frequency formula:
f = (3.00 x 108 m/s) / (2.5 x 10-7 m)
Calculating this gives:
f = 1.2 x 1015 Hz
Therefore, the frequency of the electromagnetic wave with a wavelength of 250 nm is 1.2 x 1015 Hz.