Summary Optical Properties and Photons Grade 12 Physical Science
4 views 0 purchase
Course
Physical Sciences
Institution
12th Grade
These notes are provide detailed information on the optical properties and photons chapter in the Mind Action Series Physical Science Grade 12 textbook. These notes are colourful, have diagrams for further explanation and are very easily understood.
Chapter 9
{ electromagnetic waves } Threshold (CUT-OFF) frequency
*read page 105* (f0):
o minimum frequency of incident
Factors of EM waves: radiation at which electrons will be
emitted from a particular metal
1. Transverse o corresponds to a maximum
wavelength
2. Travel through vacuum WORK FUNCTION (Wo):
3. Travel @ 3 x 108 in vacuum o minimum amount of energy needed to
emit an electron from the surface of
4. Obey wave equation a metal
(c = f λ)
5. Carries energy in the form When E of photon > Wo of metal &
of photons Flight> Fo
➢ Photoelectrons = released
electromagnetic spectrum ➢ Energy of photoelectrons =
Ek (kinetic energy)
Photoelectrons = only release from
surface of a metal when Flight
surpasses the Fo of a metal
*if same metal = used, Wo = k*
Speed of light
➢ Look at F (Hz) & λ(m) in textbook C= fλ
{ photoelectric effect } F = frequency (Hz)
λ = wavelength (m)
C = speed of light in a vacuum
* read pg 106 * ➢ Constant = 3 x 108
Definition: Photon energy
o the process that occurs when Elight = transmitted as a photon
light shines on a metal and ➢ Each photon consists of = amount
electrons are ejected of energy called a quantum
o it establishes the quantum ∝
theory & it illustrates
particle nature of light E = hf
= nb bcz establishes quantum theory & E = hc/ λ
illustrates the particle nature of light E = energy of photon (J)
H = Planck’s constant
M = e/f
o 6.6 x 10-34
= H (planck) F = Frequency (Hz)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jacquelinedossantos. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.98. You're not tied to anything after your purchase.
