Question

answer please find r,e,sin i/sin r

Answer 1

That is an experiment you should do the experiment to get the values which have to be filled in the blank

Don't worry

There is another way to find out

Since sin i /sin r gives the refractive index you can substitute the values of refractive index and find sin r

For examples

If the refractive index of glass slab is 1.5

n2/ n1 = sin i /sin r

N2 is air which means refractive index is 1

So let's substitute

1/1.5 = sin 30 /sinr

Sinr = sin 30 × 1.5

Similarly you can find the other values but the values should be found experimentally

Hope it helps = )