## Light variables

hannabarlow1A
Posts: 37
Joined: Mon Jun 17, 2019 7:23 am

### Light variables

Could someone please explain the different variables we measure when dealing with light and their relationships to one another? I remember frequency and wavelength, but think I am forgetting one or two? Thank you!

Haorui Li 1A
Posts: 30
Joined: Mon Jun 17, 2019 7:23 am

### Re: Light variables

Properties of Light:
1.Wavelength(λ)
a. Distance between two consecutive peaks or troughs in a wave
b. Measured in meters (SI system)
2. Frequency(ν)
a. The number of waves that pass a given point per second
b. Measured in hertz (sec-1) 1Hz=1 (1/s)
3. Speed(c)
a. Measured in meters/sec
b. Speed in Vacuum: 2.9979 x 10 to the 8th power (m/sec)

λν=c

Chem_Mod
Posts: 18138
Joined: Thu Aug 04, 2011 1:53 pm
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### Re: Light variables

Remember the speed of light constant: C = 3.00*10^8 m/s and Planck's constant: h = 6.626*10^-34 and the equations that relate the light variables together:
C= wavelength*frequency
Energy = h*frequency