## EM spectrum

$c=\lambda v$

Simrina Desar Dis 1H
Posts: 49
Joined: Fri Sep 29, 2017 7:04 am

### EM spectrum

Would we need to know all the wavelengths of light in the EM spectrum?

Morgan Baxter 1E
Posts: 50
Joined: Thu Jul 27, 2017 3:00 am

### Re: EM spectrum

My TA told me that in terms of visible light, we should know the top and bottom of the range of wavelengths for visible light, and know which end corresponds to red and which corresponds to violet, but that we do not need to know, for example, exactly what is the wavelength for green and what is orange. In terms of the other types of light, I think it is important to know the order of increasing/decreasing wavelengths, but I don't think there will be any specific questions as specific as the wavelength of a microwave.

Nickolas Manipud 1C
Posts: 60
Joined: Fri Sep 29, 2017 7:07 am

### Re: EM spectrum

You should know that visible light is about 400-700 nm.

It also may be useful to know the order of the EM spectrum and that the Balmer series consists of visible light and Lyman consists of UV.

Vasiliki G Dis1C
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

### Re: EM spectrum

You don't need to know specific wavelengths, but I think it is helpful to know the relative wavelengths of the whole spectrum. For example, gamma-rays or x-rays have shorter wavelengths than microwaves and etc.

Posts: 53
Joined: Fri Sep 29, 2017 7:03 am

### Re: EM spectrum

I noticed that one of the questions asked us what visible color is of the wavelength 486. Should I know the exact ranges of when purple becoming blue since the answer was blue?

Angel R Morales Dis1G
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

### Re: EM spectrum

Adam Enomoto 1K wrote:I noticed that one of the questions asked us what visible color is of the wavelength 486. Should I know the exact ranges of when purple becoming blue since the answer was blue?

I took the test today and nothing was asked regarding the color of the wavelength; however, my t.a did mention a couple of times that you should know the range of the visible light, red=700, violet=400, as well as having a general idea of the wavelength of the other waves.

Chloe Blume 1F
Posts: 15
Joined: Fri Sep 29, 2017 7:04 am

### Re: EM spectrum

It is not required to know the exact wavelengths of the spectra but I do think it is important you know the general idea of what order the waves go in. For example you should know that infrared wavelengths are longer than visible light wavelengths and that visible light wavelengths are longer than ultraviolet wavelengths.