Question

If 71 cd of intensity are transmitted through a piece of glass that is 6.8 mm thick, what intensity was the incident light, in cd? Assume the reflectivity is 0.041 and the absorption coefficient is 0.22 mm^-1. (Answer format X)

Answer 1

concept - if I0 is the incident intensity and I is the transmitted intansity than accroding to BEER - LAMBERT law

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• where k= absorption coefficient

Solution - in question it is given thst

I = 71

x = 6.8 mm

k= 0.22 mm-1

I0 = ?

putting all the above value in the formula gives

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