When two Lasers meet what happens

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WHat happpens when two Lasers meet,is their behavior same as when two Light beams meet that are emitted from a general Electric torch,i want to know what happens
Thanks in advance
 
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Nothing and yes.

But when matter is present at the crossing point, very interesting effects can happen, especially if we're talking about femtosecond pulses meeting in a non-linear crystal (incidently the subject of some of my graduate studies).