## Wavelengths and frequencies

$c=\lambda v$

sarahtang4B
Posts: 132
Joined: Fri Sep 28, 2018 12:27 am

### Wavelengths and frequencies

Are we going to need to know what wavelengths correspond to what kind of radiation(besides visible light) such as gamma ray, microwaves, etc. on Test 2?

Kathryn Wilhem 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

### Re: Wavelengths and frequencies

I don't think we need to know specific wavelengths, but we do have to know the order from longest to shortest wavelengths.

Dayna Pham 1I
Posts: 98
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 3 times

### Re: Wavelengths and frequencies

I think it would be useful to remember the order of the wavelength classifications from largest to smallest energy, but not necessary to remember the exact length of each category, such as 10^-12

Nicole Elhosni 2I
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

### Re: Wavelengths and frequencies

I am going to try and remember the ranges they are in. For example, that x-rays are 10^-9 m. There was a question on the homework that asked to identify what spectrum the light was in based on its wavelength.

Sapna Ramappa 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

### Re: Wavelengths and frequencies

Nope! It would probably be a good idea to know the general order of the lights' wavelengths, but you won't need to know the specific ranges for anything other than visible light! :)

305115396
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

### Re: Wavelengths and frequencies

I think you should have a general idea of what the order is of the wavelengths from smallest to largest and around what range each of the types of radiation are in but you do not need to know specifically.

005199302
Posts: 108
Joined: Fri Sep 28, 2018 12:15 am

### Re: Wavelengths and frequencies

There were one or two questions on the homework that required you to know specific wavelengths, so it may be helpful to know.

Soumya Ravichandran 4H
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

### Re: Wavelengths and frequencies

No, I don't think the specific wavelengths are necessary. Rather, maybe just knowing the spectrum in order of increasing wavelength/frequency might be helpful since you can check if your answers are reasonable. Also, knowing that visible light is between 400-900 nm is important.

Brice McKeown 3D
Posts: 35
Joined: Fri Sep 28, 2018 12:25 am

### Re: Wavelengths and frequencies

Does anyone know of examples of infrared radiation?

SydBenedict2H
Posts: 60
Joined: Wed Nov 08, 2017 3:00 am

### Re: Wavelengths and frequencies

Honestly as long as you know the order and which is shortest and which is longest, you should be ok. I would try to learn the rough values of each differing type, but beyond that I think you should be fine.

Dana Wilks 3I
Posts: 30
Joined: Fri Sep 28, 2018 12:23 am

### Re: Wavelengths and frequencies

Brice McKeown 3D wrote:Does anyone know of examples of infrared radiation?

I did some research that said infrared radiation is emitted when objects are hot but not hot enough to emit visible light. This makes sense because infrared radiation in just below visible light on the EMR spectrum, with red having the lowest energy of the different types of visible light. Some examples include burning charcoal or a radiator emitting warmth.