Recent content by TheOfficialAB

Hi, I'm doing a module on quantum optics and lasers. Most of the texts and online source I have read simply state that 'population inversion is essential for amplification in laser operation'. My question is, why? Amplification/Gain is essentially the result of stimulated emission. Can't...

Apologies for this late reply (and my lack of understanding of basic maths). Thanks for all your time and effort Oxvillian. The due date for this practice problem is now well passed. However, after your last reply I saw where I was going wrong and fixed the calculations to reflect the correct...

Though the plane spacing can be related to the reciprocal lattice vector along the plane as you have said (proof of this is also in my notes), I have been given the Miller indices of lattice planes in this question. If I recall correctly the Miller indices are the shortest reciprocal lattice...

Thanks for your reply, Oxvillian. You're right! I did do the wrong calculations. The correct formula for the d-spacing in the tetragonal phase appears to be: \begin{equation} d = \frac{a}{ \sqrt{ h^{2} + k^{2} } } + \frac{c}{ \sqrt{ l^{2} } } \end{equation} I can use the fact that the volume...

Thank you all very much! I'll stick up my solution as a reply soon. I look forward to seeing you all around PF! Haha, cheers mate! My lab reports are done through LaTeX, all the formatting finally seems to have drilled its way into my skull :oldbiggrin:

Assume, for example, I posted a thread in the Homework forum that no one replied to. Now, later on, after much trying, I have answered the question and found the solution. If I want to put my solution up on the thread, do I: a) Edit my post to include it? and include [SOLVED] in the title? or...

Homework Statement [/B] Hi there! This is a question from a practice problem sheet I got from the lecturer of my Condensed Matter 1 course. Below are the normal vectors to the {111} and {112} lattice planes: Homework Equations [/B] Bragg Condition: \begin{equation} n \lambda = d \sin...

My name's Abhinav, but you can call me AB. I'm here to physics. (can I verb-ify that? ... well I'm going to anyway). I'm currently an undergrad doing a materials science degree :) Looking forward to asking a load of questions (and answering those which I can, too!). Hope to see all you...