A practical application of quantum mechanics

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Quantum mechanics has practical applications in technologies like transistors and lasers, which are foundational to modern electronics and communication systems. Transistors, for example, utilize quantum principles to control electrical signals, enabling the operation of computers and smartphones. Lasers, another application, rely on quantum mechanics for precise light amplification, impacting fields such as medicine, telecommunications, and manufacturing. Understanding these applications highlights the relevance of quantum mechanics in everyday technology and innovation. Engaging with these concepts can enhance comprehension of the scientific principles that drive technological advancements.
Raina
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Give one practical application of quantum mechanics and write about it in 4 to 5 sentences.
 
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You forgot the magic word. This thread will self destruct in 5... 4... 3...
 
meaning ?
 
Read your first post again. You are not asking any question or asking for help. You are telling us to do something. If your teacher required you to do this, that may well be a good reason for you to do it. The fact that you tell me to do something is not at all a good reason for me to do it!

The magic word Ibrits was trying to bring to your attention was "please".

I will also mention another: "transistor".
 
Read the Wikipedia article for "LASER" or "transistor", as suggested by Halls.
 
Raina said:
Give one practical application of quantum mechanics and write about it in 4 to 5 sentences.

sounds like school work, why should we do it? Motivate.
 

Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
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