If two coherent waves, one with intensity 8.0 units and the other with intensity 4.0 units, undergo destructive interference, what is the resulting intensity?

When two coherent waves undergo destructive interference, the resulting intensity can be calculated as



where I₁ and I₂ are the given intensities of the waves. Thus, for these two particular coherent waves, we have

 


Thus, the resulting intensity has a value of 0.69 units.

0.69 units

What formula  this one  (x_/

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.