Question

A bird is flying up at angle `sin^(-1)(3//5)` with the horizontal. A fish in a pond looks at that bird. When it is vertically above the fish. The angle at which the bird appears to fly (to the fish) is `[n_(water)=4//3]`
A. `sin^(-1)(3//5)`
B. `sin^(-1)(4//5)`
C. `45^(@)`
D. `sin^(-1)(9//16)`

Answer 1

Correct Answer - c.
Let y-axis be vertically upward and x-axis be horizontal.
`V_(y)(app.)=(V_(y)(real))/(((1)/(mu)))`
`V_(y)(app.)=V_(x)(real.)`
`tanphi=(V_(y)(app))/(V_(x)(app))=(4)/(3)tantheta=(4)/(3)xx(3)/(4)=1`