ENGINEERING PHYSICS - EXAMPLE 30.2 : The Planck-Einstein relation connects the p

ENGINEERING PHYSICS - EXAMPLE 30.2 : The Planck-Einstein relation connects the particulate photon energy E with its associated wave frequency f to produce E = hf. Let h to be the Planck constant. The frequency f, wavelength L and speed of light c are related by E = hc / L. With p denoting the linear momentum of a particle, the de Broglie wavelength L of the particle is given by L = h / p. (a) Find the equation of E as a function of p and c. (b) If E has a unit of electron-volt and f has a unit of 1 / second, then what is the unit of h?

Question Posted / kangchuentat

1 Answers
2040 Views
I also Faced
E-Mail Answers

ENGINEERING PHYSICS - EXAMPLE 30.2 : The Planck-Einstein relation connects the particulate photon en..

Answer / kangchuentat

ENGINEERING PHYSICS - ANSWER 30.2 : (a) Let first equation : E = hc / L, second equation : L = h / p. Substitute the second equation into first equation will produce E = hc / L = hc / (h / p) = pc. (b) E = hf then h = E / f. Dimensional analysis of h will produce E / f of electron-volt / (1 / second) or electron-volt-second. The answer is given by Kang Chuen Tat; PO Box 6263, Dandenong, Victoria VIC 3175, Australia; SMS +61405421706; chuentat@hotmail.com; http://kangchuentat.wordpress.com.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Chemical Engineering Interview Questions

A cylinder with a movable piston contains 0.1 mole of a monoatomic ideal gas. The piston moves through state a, b and c. The heat Q, changes from state c to a is 685 J. The work W, changes from state c to a is -120 J. The work, W performed from state a to b then to c is 75 J. By using the first law of thermodynamic, U = Q W where U is the internal energy : (a) Determine the change in internal energy between states a and c. (b) Is heat added or removed from the gas when the gas is taken along the path abc? (c) Calculate the heat added or removed when the gas is taken along the path abc?

1 Answers

1.How a chlorine leak is detected? 2.What would happen if excess chlorine is added to water in cooling tower?

3 Answers

Why is post-weld heat treatment (stress relieving) sometimes necessary for welded vessels?

0 Answers

What is pneumatic conveying?

0 Answers

What is the difference between cfm (cubic feet per minute) and scfm (standard cubic feet per minute)?

0 Answers

what is meaning of pid how it is useing controlers

4 Answers

What is the maximum permissible Earth to Neutral voltage in an electrical system.

0 Answers

Question 8 - A local utility burns coal having the following composition on a dry basis : Carbon (C) 83.05 %, hydrogen (H) 4.45 %, oxygen (O) 3.36 %, nitrogen (N) 1.08 %, sulfur (S) 0.7 % and ash 7.36 %. Calculate the ash free composition of the coal with reference to C, H, O, N and S.

1 Answers

based on percentage problems

0 Answers Amara Raja,

what is mean by reflux ratio?

4 Answers

What are the steps involved in wine making?

2 Answers Aramco,

What is a good method of minimizing shell side pressure drop in a shell and tube exchanger?

0 Answers

For more Chemical Engineering Interview Questions Click Here