Find out the following in the figure shown below :

(a) The apparent distance of the fish from the surface as observed by the bird
(b) The apparent distance of the bird from the surface as observed by the fish

Explanation

`("apparent depth")/("Real depth")=n_(2)/n_(1)=(d')/d`
`1/(4//3)=(d')/36`
`rArr d'=27` cm

(b)
`(4//3)/1=(d')/36`
`rArr d'=48` cm