Click the screen. This is the first lesson in “How microwaves work” but there’s a Laser frequency slider. Higher frequencies also appear shorter. Note that in real life, the water molecule would have Absorption lines witch are the only frequency that the molecule will heat up wen received. Also, the speed of light is faster than this.
I was thinking of the fact that red light has less energy than blue light, so blue light should heat up a water molecule more than red light.