Question

if the radius of 2 bhor orbit of hydrogen atom is r2 the radius of thirs bhor orbit will be

Answer 1

here, a. = 0.529 ( also called bohr's radius)

Answer 2

Radius of bohr orbit is equal to 0.53(n)2(square)
So,0.53*9,we get 4.77(take n is equal to 3 because of radius of third bohr orbit)