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