INTRODUCTION - IS LIGHT A WAVE OR PARTICLES?

Some definitions for electromagnetic radiation -

$\lambda$ (lambda) - wavelength (meters)

$\nu$ (nu) - frequency (1/seconds), also denoted by f !

c - speed of light (meters/second)

Some definitions for particles -

E - energy (kg meters2 /seconds2 = Joule (J), 1 eV (electron volt) = 1.602 x 10-19 Joules.)

p - momentum (= mv, m - mass (kg), v - velocity (meters/second))

v=pc2/E (Result from relativity - view derivation)

If you need help on waves you can

  • go to the beach and watch the waves (or surf them)
  • check out Hanan Schecter's notes on waves

    The equations above relate to wave motion from Physics 2 or were derived in Physics 1 in the relativity part.

    To revise waves, see these links for definitions and an example.

    To revise relativity, read your notes from Physics 1 or read Chapter 39 of Serway and Beichner or read Chapter 1 of Tipler where eqs 1.39 (E2=p2c2 +m2 c2) and 1.40 (E=pc) are derived. You may come to my office hours or the metargelet's office hours or

    ``shaot yeutz'' if you need more help.

    The example exercises for the first week also include revisions of these topics.

    IMPORTANT to REMEMBER

    Almost all the prefixes for meters etc are given in this table except Angstrom which is a special unit.


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    PHYSICS 3- HOMEPAGE

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