Question

What is electromagnetic spectrum?

Answer 1

1. It is the range of all types of electromagnetic radiation.
2. The electromagnetic spectrum is a range of frequencies, wavelengths and photon energies.
3. Which covers frequencies from below $1hz$ to above ${10}^{25}Hz$.
4. It corresponds to wavelengths which are a few kilometres to a fraction of the size of an atomic nucleus in the spectrum of electromagnetic waves.