Quantum Physics

Jun 17th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

A photon is a discrete packet {or quantum} of energy of an electromagnetic radiation/wave. Energy of a photon, E = h f = hc / λ where h: Planck's constant λviolet ≈ 4 x 10-7 m, λred ≈ 7 x 10-7 m Power of electromagnetic radiation, P = Rate of incidence of photon x Energy of a photon = (N/t)(hc/λ)

Word Count: 1471
Showing Page: 1/7
Quantum PhysicsAphotonis a discretepacket {or quantum} of energyof anelectromagnetic radiation/wave.Energy of a photon,E = h f = hc / ?where h: Planck's constant?violet? 4 x 10-7m, ?red? 7 x 10-7mPowerof electromagnetic radiation,P = Rate of incidence of photon x Energy of a photon = (N/t)(hc/?)Photoelectric effectrefers to theemission of electronsfrom a coldmetal surfacewhenelectromagnetic radiationofsufficiently high frequencyfalls on it.4 Major Observations:1. No electrons are emitted if the frequency of the light is below a minimum frequency {called thethreshold frequency}, regardless of the intensity of light2. Rate of electron emission {ie photoelectric current} is proportional to the light intensity.3. {Emitted electrons have a range of kinetic energy,ranging from zero to a certain maximum value. Increasing the freq increases the kinetic energies of the emitted electrons and in particular, increases the maximum kinetic energy.}Thismaximumkinetic energy depends only on the frequency and the metal used {?}; the intensity has no effect on the kinetic energy of the electrons.4. Emission of electrons beginsinstantaneously{i.e. no time lag between emission & illumination} even if the intensity is very low.NB: (1), (3) & (4) cannot be explained by Wave Theory of Light; instead they provide evidence for the particulate/particle nature of electromagnetic radiation.Explanation for how photoelectric effect provides evidence for the particul

Review from student

Studypool Student
" Thank you, Thank you, for top quality work, this is your guy!! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1819 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors