Question

all weath per sentence



what is the answer​

Answer 1

Answer:

CRITICAL ANGLE IS 90 DEGREE..!! OK

SO WHY GOOGLE SAYS THAT CRITICAL ANGLE FOR MOST GLASS IS 42 DEGREE..??

I MEAN IF IT IS 90 DEGREE SO WHY GOOGLE'S SAY IT IS 42 DEGREE FOE MOST GLASS??

WHAT IT MEAN BY GOOGLE