Sound vs Microwaves vs Light #science #greenbank

Imagine this megaphone didn't emit sound waves, but instead electromagnetic waves. — Okay, so let's say I set the wavelength coming out of this megaphone to about 12 cm. That's like 5 in for you Americans. If I do that, what would be coming out of this megaphone is basically microwaves, the same ones as in your microwave. If instead of that I set this to a much smaller wavelength, say 500 nanometers, you'd actually be able to see that stream of electromagnetic waves cuz that 500 nmters is the wavelength of blue