## Electromagnetic Spectrum

$c=\lambda v$

tonyhu
Posts: 57
Joined: Tue Sep 24, 2019 12:17 am

### Electromagnetic Spectrum

For the course, do we need to memorize the wavelenghts of different waves like visible light?

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

### Re: Electromagnetic Spectrum

It does not mention that in the class website "Learning outcome; Outline 2: The Quantum World" pdf, but some HW questions requires that knowledge.

sarahwu3a
Posts: 50
Joined: Sat Aug 17, 2019 12:17 am

### Re: Electromagnetic Spectrum

I don't think you need to memorize all the wavelengths for light but knowing that visible is about 400-700nm is definitely going to be necessary!

Erik Buetow 1F
Posts: 96
Joined: Fri Aug 30, 2019 12:15 am

### Re: Electromagnetic Spectrum

I don't know for sure, but I feel like it would be helpful to know both the lyman series (UV) and the balmer series (visible) and their corresponding energy levels and wavelengths.

Julia Mazzucato 4D
Posts: 64
Joined: Fri Aug 30, 2019 12:17 am

### Re: Electromagnetic Spectrum

It'll probably be useful, especially with problems from photoelectric effect/atomic spectra lessons.
Here's a breakdown by wavelength from smallest wavelengths (highest frequency) to largest wavelength:

Gamma rays, <0.01 nm
X-rays, 0.01 nm - 10 nm
Ultraviolet, 10 nm - 400 nm
Visible Light, 400 nm - 700 nm
Infrared, 700 nm - 1 mm
Microwaves, 1 mm - 30 mm