## Memorizing light

$c=\lambda v$

DMuth_1J
Posts: 63
Joined: Thu Jul 11, 2019 12:15 am

### Memorizing light

Hello, I was wondering if we are expected to memorize the wavelengths / frequencies of the different kinds of light. I know we are expected to remember that the visible spectrum is around 400-700 nm, but what about the others like UV, x-ray, y-ray, infrared, etc. Will we need to memorize the shortest to longest order?

Jainam Shah 4I
Posts: 130
Joined: Fri Aug 30, 2019 12:16 am

### Re: Memorizing light

I think it would be a good idea to know the ranges of each spectrum for the light spectrum. You would not have to know specific wavelengths for colors I believe, but you might want to know red is around 700 nm and violet is the shortest one being at 400 nm.

Justin Seok 2A
Posts: 104
Joined: Sat Aug 24, 2019 12:15 am

### Re: Memorizing light

It may be useful to generally know the order of common waves, like the fact that ultraviolet is lower wavelength than visible light for things like Lyman series or infrared is higher wavelength than visible light. It probably won't be super important to remember though.

Tai Metzger 3K
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am

### Re: Memorizing light

I find it useful to know the order of frequencies for different types of EM radiation (e.g. radiowaves<microwaves<infrared<visible light<UV<xray<gamma rays).
Additionally, I think you are correct in thinking that we should know that visible light is 400-700 nm.

Abby Soriano 1J
Posts: 103
Joined: Sat Aug 24, 2019 12:16 am

### Re: Memorizing light

My old high school teacher had a kind of silly yet helpful way of memorizing the electromagnetic spectrum:
"Remind Me If Visible Underwear eXcites Grandma" - Radio waves, Microwaves, Infrared, Visible, Ultraviolet, X-rays, Gamma rays
Hopefully, you find this as helpful as I did!