Light variables

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Light variables

Postby hannabarlow1A » Wed Jun 26, 2019 8:50 pm

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

Postby Haorui Li 1A » Wed Jun 26, 2019 9:33 pm

Properties of Light:
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)


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Re: Light variables

Postby Chem_Mod » Wed Jun 26, 2019 9:39 pm

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

Radha Patel 4I
Posts: 71
Joined: Tue Feb 12, 2019 12:15 am

Re: Light variables

Postby Radha Patel 4I » Sun Jul 07, 2019 5:45 pm

Aside from the speed of light, if you were given the variables from the de Broglie's equation, you can solve for the wavelength and therefore use this wavelength in the equation c = wavelength x frequency.

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