The refractive index of the material of the prism and liquid are 1.56 and 1.32 respectively. What will be the value of `theta` for the following refraction ?

Explanation

There are three significant figures in each measurement. It means that the length `l` may be written as
`l = 16.2 +- 0.1 cm = 16.2 cm pm 0.6%`
Similarly, the breadth b may be written as
` b=10.2 pm 0.1cm = 10.1 cm pm 1%`
Then, the error of the product of two or more) experimental values, using the combination of errors rule, will be
`lb=163.62 cm^2 pm 1.6% -163.62 pm 2.6cm^3`
This leads use to quote the final result as
`lb = 164 pm 3 cm^3`
Here `3 cm^2` is the uncertainty or error in the estimation of area of rectangular sheet.