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### color of light

Posted: Tue Oct 16, 2018 1:43 pm
What determines the color of light- the wavelength or the frequency? I keep seeing sources that contradict each other and I am a little confused. Are they just both dependent on each other or does one have more of an effect?

### Re: color of light

Posted: Tue Oct 16, 2018 2:33 pm
Technically, they both determine the color of light. C = lamba x v shows how they are inversely proportional to the speed of light, c. Even though they both determine the color of light (they both will tell us essentially the same color on the spectrum), we most often use wavelength to determine the color of light simply because it is more convenient and the easier of the two to measure.

### Re: color of light

Posted: Tue Oct 16, 2018 3:25 pm
The wavelength or the frequency can determine the color of light because of the equation c = wavelength x frequency. The color of light is more commonly identified by wavelength however, because this is seen based on the values on the electromagnetic spectrum in nm.

### Re: color of light

Posted: Wed Oct 17, 2018 11:08 am
Considering the equation c = lambda * nu, the color of light is reliant on both wavelength and frequency. Wavelength is the standard to describe what color it is though.

### Re: color of light

Posted: Wed Oct 17, 2018 11:24 am
Prof. Lavelle has made measurements of light using the wavelength of light, for instance when he mentioned that the wavelengths of violet and red light are 400 and 700 nm, respectively. Wavelength is typically used to determine the color of light.

### Re: color of light

Posted: Thu Oct 18, 2018 9:04 pm
Both can be used to determine the color of visible light. You can identity the specific color of light by mainly by wavelength but if you know the wavelength you find the frequency of light and compare it to what color that would be as well, by the equation speed of light = frequency x wavelength. Together, wavelength and frequency are inversely proportional to one another where if one variable such as the frequency or wavelength increases the other variable will decreases in proportion so that the product which is the speed of light will still remain unchanged.

### Re: color of light

Posted: Fri Oct 19, 2018 9:58 pm
I have looked at a few sites and many have stated though the frequency and wavelength are inversely proportional to speed of light the wave length is often the indicator of what the color is.

### Re: color of light

Posted: Sat Oct 20, 2018 1:48 am
If you look at a typical spectrum with the range of visible light, you will find that many spectrums use wavelength to differentiate between colors. However, since wavelength and frequency are inversely related, you can say that frequency also determines the color of light.

### Re: color of light

Posted: Sat Oct 20, 2018 12:39 pm
Hi! According to the book, the color of light depends on its frequency and wavelength; long wavelength radiation has a lower frequency than short wavelength radiation (p6, edition6).

### Re: color of light

Posted: Sat Oct 20, 2018 5:56 pm
Color is often expressed in terms of wavelength, but since wavelength and frequency are inversely related, both can apply.

### Re: color of light

Posted: Sat Oct 20, 2018 6:13 pm
Both wavelength and frequency play a part in determining the color of light. It's just that visible spectrum diagrams always use wavelength to indicate the color.

### Re: color of light

Posted: Sun Oct 21, 2018 12:09 am
Color is interpreted based on the spectrum; we use wavelength because it's the easier of the two, vs frequency.