580 nm light shines on a double slit with d = 0.000125 m. What is the
angle of the second bright
interference maximum (m = 2)?
(Remember, nano means 10^-9.)
(Unit = deg) PLS HELP i keep getting errors on my calculator

The answer would be a) -80of

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.