The dye acriflavine when dissolved in water has its maximum light absorption at 4530 A and has maximum florescence emission at 5080 A. the number of florescence quanta is, on the average, 53% of the number of quanta absorbed. What percentage of absorbed light energy is emitted as fluorescence?

(A) 41%

(B) 47%

(C) 74%

(D) 63%

in a physics laboratory a block x is balanced by a block Y of mass 200 kg,each are suspended from a balance of equal lever arms .the scale pan on X is at a height.H1=2 cm ,where as scale pan on Y is at height 1 cm above the floor.the error in weighing is (in gram)

consider the figure of a single riveted lap joint as follows

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cyclic heat engine operates between. temperature of 30 C. What is the least rate of heat rejection per kW net output of an engine. source temperature of 800 C and sink

 

 

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