LASER Applications help please

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The discussion focuses on the characteristics of lasers that enable various applications, including holography, missile guidance, and medical surgery. Key properties identified include coherence, collimation, and intensity, which are crucial for different uses such as telecommunications and laser cutting. Participants emphasize the importance of conducting personal research to understand these characteristics better. There is a request for clarification and correction of initial answers regarding laser properties. The conversation highlights the need for accurate information and self-research in understanding laser applications.
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New user has been reminded to please always show their work on schoolwork problems.
Homework Statement
Determine which characteristic of LASER is used
Relevant Equations
No equations in this problem
Can someone tell me about the characteristic of LASER that enables it from the following usage:
1-holography 2-orienting missiles 3-star wars 4-CD and DVD 5-medical surgery 6- telecommunications and fiber optics 7-LASER printer 8-cutting metals
 
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Not without you trying first. Please review the homework guidelines

Have you tried researching on the web yet? What if you searched for something like "lasers for cutting metals".
 
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DaveE said:
Not without you trying first. Please review the homework guidelines

Have you tried researching on the web yet? What if you searched for something like "lasers for cutting metals".
I tried and saw many books on this topic , but they differ about the characteristics and every book and website say a different characteristic.
 
I
DaveE said:
Not without you trying first. Please review the homework guidelines

Have you tried researching on the web yet? What if you searched for something like "lasers for cutting metals"
That is my trial in order:
1- holography: coherence
2- orienting missiles: collimation
3- star wars: intensity
4- CD and DVD: collimaton
5- medical surgery: intensity
6- telecommunications and fiber optics: coherence and collimation
7- LASER printer: collimation
8- cutting metals: ??

[List edited by the Mentors for clarity]

I hope you help me and edit my wrong answers.
 
Last edited by a moderator:
Loyal bear said:
I hope you help me and edit my wrong answers.
We do not edit wrong answers for you here.

What-all are the properties of lasers that you are using? So far I think I see three: intensity, coherence and collimation. Are there any others? Where did you find those properties?
 
Thread 'Chain falling out of a horizontal tube onto a table'

Thread 'Chain falling out of a horizontal tube onto a table'

My attempt: Initial total M.E = PE of hanging part + PE of part of chain in the tube. I've considered the table as to be at zero of PE. PE of hanging part = ##\frac{1}{2} \frac{m}{l}gh^{2}##. PE of part in the tube = ##\frac{m}{l}(l - h)gh##. Final ME = ##\frac{1}{2}\frac{m}{l}gh^{2}## + ##\frac{1}{2}\frac{m}{l}hv^{2}##. Since Initial ME = Final ME. Therefore, ##\frac{1}{2}\frac{m}{l}hv^{2}## = ##\frac{m}{l}(l-h)gh##. Solving this gives: ## v = \sqrt{2g(l-h)}##. But the answer in the book...
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