2. Wavelength – λ – distance between successive points on a wave (crest to crest)

3. Amplitude – vertical distance fro the midline of a wave to the peak or trough

4. Frequency - ν – number of waves that pass a point in 1 second Hz = cycles per second

5. Speed of a wave u = λ ν
Problem page 248
Calculate the frequency (in Hz) of a wave whose speed and wavelength are 713 m/s and 1.14 m, respectively.

6. Electromagnetic Spectra

7. Electromagnetic Spectra

8. Electromagnetic Spectra

9. Electromagnetic Spectra
Electromagnetic waves Travel at the speed of light = 3.00 x 108 m/s or 186,000 mi/s
ν = c / λ

10. Problem page 249
What is the wavelength (in meters) of an electromagnetic wave whose frequency is 3.64 x 107 Hz?

11. Planck’s quantum theory
Quantum – the smallest quantity of energy that can be emitted or absorbed in the form of electromagnetic radiation.
E = hν
h = planck’s constant = 6.63 x J s

12. Planck’s quantum theory
Energy is always emitted in multiples of hν… 2 hν…. 3 hν

13. Photoelectric effect

14. Problem page 252
The energy of a photon is 5.87 x What is its wavelength in nanometers?