fill in the blank 4 points. which type of electromagnetic radiation has the longest wavelength? choose your…

Brief Explanations:

Electromagnetic spectrum includes various radiations. Radio waves have the longest wavelength among them. The relationship between wavelength ($\lambda$) and frequency ($f$) is given by $c = \lambda f$ (where $c$ is the speed of light). Since $c$ is constant, a long - wavelength radiation has a low frequency.

Answer:

First blank: Radio waves Second blank: Low