Correct me if i have mistake.
Initially i never think of index of refraction of acrylic, that's why i believe laser beam can pass through acrylic smoothly. ( As shown in picture 1 )
I want to capture flow pattern as shown in picture 2.
Since the laser bream will be refracted, then i should run the experiment in 2 ways which are laser beam emitted to bottom part and then to upper part??
Is that what you guys mean??