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Lauren Huang 1H
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Joined: Fri Sep 28, 2018 12:16 am


Postby Lauren Huang 1H » Tue Oct 16, 2018 10:57 pm

Can wavelengths have negative values?

Posts: 35
Joined: Fri Sep 28, 2018 12:23 am

Re: Wavelengths

Postby Ahmet_Dikyurt_3L » Tue Oct 16, 2018 11:10 pm

Wavelengths are lengths, so if there is a direction given, they could have a negative value but distance-wise no. It is the same for every length.
Example: You can say -10 meters east (10 meters west)
Example: You cannot say I walked -10 meters.
Same goes for wavelengths.

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Re: Wavelengths

Postby Chloe Thorpe 1J » Tue Oct 16, 2018 11:12 pm

Wavelengths, by convention, can’t be negative as far as I understand. For instance, wavelength is equal to the speed of light over frequency, both of which are always positive values; so, wavelength couldn’t be negative. It’s also usually measured in a unit like meters, which can’t have negative value.

Phil Timoteo 1K
Posts: 101
Joined: Fri Apr 06, 2018 11:05 am

Re: Wavelengths

Postby Phil Timoteo 1K » Wed Oct 17, 2018 1:42 am

Wavelengths are always a positive number

Sydney Aurelio_Dis4B
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Wavelengths

Postby Sydney Aurelio_Dis4B » Wed Oct 17, 2018 2:29 am

A wavelength can be negative when you are referring to direction of the wave. However, in the types of problems we are doing now we are mainly concerned with photons and photons can not have a negative wavelength.

Hanlin Zhu 4G
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Wavelengths

Postby Hanlin Zhu 4G » Wed Oct 17, 2018 8:22 am

I think wavelength should be a positive value. It is a measure of length rather than displacement.

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