what are the units of wavelengh
They can be any length units, but it is common to use meters for radio waves, centimeters for microwaves, micrometers for infrared, and nanometers or Angstroms (10^-8 cm) for visible and ultraviolet light.
Regardless of what I wrote in my previous answer, if you are performing a calculation using a formula that involves wavelength, it is a usually good idea to express wavelengths in meters in all situations. That is the official SI unit for length.
To determine the units of wavelength, one would need to understand the context in which it is being mentioned. In the context of electromagnetic waves, the units of wavelength can vary based on the specific type of wave being discussed.
The most common unit for measuring wavelength is meters (m). This is often used for radio waves, where the wavelengths can be quite large. For example, the wavelength of FM radio waves is typically around 3 meters.
In other cases, shorter wavelengths are used. For example, centimeters (cm) are commonly used for measuring the wavelength of microwaves. Infrared waves, on the other hand, are often measured in micrometers (μm) or nanometers (nm).
For visible light and ultraviolet waves, the most common units of wavelength are nanometers (nm) or even Angstroms (Å), where 1 Å is equal to 10^-8 centimeters.
Ultimately, the units of wavelength can vary depending on the specific application and field of study. It is important to refer to the specific context or formula being used when determining the appropriate units for measuring wavelength.