Young’s Double Slit Experimentmodels light as a wave.
An electromagnetic wave is a
transverse wave.
The speed of light in a
vacuum:
c = 3.0E8m/s
radio waves
Electromagnetic Spectrum – continuous spectrum
of all electromagnetic waves. All EM waves travel
at the speed of light. (c)
c=
λ
f
EN
E RG
Y
f
c=λ
Example: A radio wave has a wavelength
of 2.8653m. What is the frequency?
In MHz?
The frequency of infrared waves is 3.0E14Hz and
the frequency of X-rays is 6.0E17Hz. Calculate the
wavelength of both of these types of
electromagnetic waves.
How does the energy of X-rays compare to infrared
waves?
Complete the following statements:
As the frequency of an EM increases the wavelength _____________
As the frequency of an EM wave increases its energy _____________
As the wavelength of an EM wave increases its energy
_____________
As the frequency of an EM wave increases its wavelength
____________ and its speed __________________
color addition
color subtraction
Wave Fronts and Rays
Law of Reflection
Regular and Irregular Reflection
Refraction of Light Demonstration Applet
Refraction
Refraction
Reflection/Refraction
Dispersion
Total Internal Reflection
n1>n2
water to air
өc = critical angle
glass to air
ө1 < өc Reflection and refraction
glass to water
ө1 ≥ өc ONLY Reflection
n2 1
sin  c 

n1 n