Wavelength And Frequency Test Paper
Wavelength (l) and Frequency (n) Relationships
c=ln ,
where l is wavelength in meters
n is frequency in hertz, 1/s or s-1
c=3.0 x 108m/s (the speed of light in a vacuum)
Typical question #1- What is the frequency of red light with a wavelength of 690.nm? (1m=109nm)
First- l is wavelength in meters, so convert nm to meters
690.nm (
1m )=6.90 x 10-7m
109nm
Now we can rearrange the equation above and solve for frequency, since we already know the constant, c.
n=c/l
n=
3.0 x 108m/s =4.35 x 1014 s-1
6.90 x 10-7m
Typical question #2- What is the wavelength of light in nm, that has a frequency of 6.6 x 1014 Hz?
l=c/n
l=
3.0 x 108m/s =4.55 x 10-7m …show more content…
To calculate energy from frequency (or vice Versa), use the following equation
E=hn
where E is Energy in Joules (J)
n is frequency in hertz, 1/s or s-1
h=6.626 x 10-34 J s
Typical Question #1- How much energy does a photon of light with a frequency of 4.60 x 1014 s-1
c=ln ,
where l is wavelength in meters
n is frequency in hertz, 1/s or s-1
c=3.0 x 108m/s (the speed of light in a vacuum)
Typical question #1- What is the frequency of red light with a wavelength of 690.nm? (1m=109nm)
First- l is wavelength in meters, so convert nm to meters
690.nm (
1m )=6.90 x 10-7m
109nm
Now we can rearrange the equation above and solve for frequency, since we already know the constant, c.
n=c/l
n=
3.0 x 108m/s =4.35 x 1014 s-1
6.90 x 10-7m
Typical question #2- What is the wavelength of light in nm, that has a frequency of 6.6 x 1014 Hz?
l=c/n
l=
3.0 x 108m/s =4.55 x 10-7m …show more content…
To calculate energy from frequency (or vice Versa), use the following equation
E=hn
where E is Energy in Joules (J)
n is frequency in hertz, 1/s or s-1
h=6.626 x 10-34 J s
Typical Question #1- How much energy does a photon of light with a frequency of 4.60 x 1014 s-1